What Is a White Diamond? Colorless vs True White

Eric DawsonByEric Dawson Jewelry & Gemstones

So, what is a white diamond? In everyday jewelry language, it usually means a colorless diamond, often a D-F stone on GIA’s D-to-Z color scale. A true white diamond is something different: a rare Fancy white diamond with a translucent, milky or opalescent appearance caused by sub-microscopic inclusions that scatter light inside the stone.

Unlike a colorless diamond, which looks white because light passes through without interruption, a Fancy white diamond is visibly white rather than colorless and is graded as a Fancy color diamond, not on the D-to-Z scale. Natural Diamonds estimates that about one in 10,000 stones can be graded as a Fancy color diamond.

What Is a White Diamond?

The term has different everyday and gemological uses.

That distinction matters when comparing a white diamond vs colorless diamond, since the names can describe very different appearances and grading categories. Most diamonds advertised as white diamonds are colorless D-F stones, not the unusual Fancy white diamonds recognized for their cloudy-white face-up look.

Two Uses of the Same Name

Colorless diamonds are assessed for how nearly they approach an absence of color under controlled viewing conditions, using established masterstones for comparison. GIA’s D-to-Z scale includes colorless diamonds as well as diamonds with light yellow, light brown or gray tints. Greater colorlessness is generally rarer and more expensive when other qualities are equal, which helps explain why shoppers commonly use “white” as shorthand for a bright, colorless diamond.

Fancy white diamonds sit outside that framework because their visible whiteness is a distinct Fancy-color appearance, not a measure of colorlessness. Consequently, calling a stone a white diamond does not by itself identify it as either a D-F colorless diamond or a true Fancy white diamond.

True Fancy white diamonds can appear snowy, milky, porcelain-like or softly opalescent, and some show flashes of color when viewed face-up. Those inclusions create the effect. Scientists may need electron microscopes to study these tiny inclusions because traditional optical microscopes cannot always isolate them.

Unlike many other Fancy colors, white does not come from non-carbon elements or atomic-level defects in the diamond. Instead, the scattered light gives the gem its unusual cloudlike appearance, at times resembling a white opal with weak play-of-color.

Because Fancy white diamonds are uncommon, the term deserves careful use in product descriptions and conversations about value. GIA describes white diamonds as infrequently submitted for examination.

A white diamond price per carat question therefore starts with determining which type of diamond is under discussion: a colorless stone marketed as white or a naturally opalescent Fancy white diamond. Buyers should look for wording that identifies a stone as Fancy white or opalescent when that rare appearance is being represented. Clear terminology helps prevent a colorless diamond from being mistaken for a visibly white Fancy-color diamond.

White Diamond vs Colorless Diamond

Appearance is the clearest dividing line in a white diamond vs colorless diamond comparison. A colorless diamond in GIA’s D-to-Z range can be casually called white, yet a true Fancy white diamond has a visibly milky, translucent or opalescent appearance.

Rather than describing the same quality on a single scale, the terms point to diamonds whose light behaves differently. Their shared everyday label can conceal the contrast.

Colorless diamonds look white in ordinary viewing because nothing interrupts light passing through the natural stone. By contrast, sub-microscopic inclusions inside a Fancy white diamond scatter that light, producing its cloudy or porcelain-like face-up look.

Some stones can show flashes of color when viewed face-up, an effect that can recall a white opal with weak play-of-color. They can require specialized study. Electron microscopes are often used to study them.

Grading follows that visual distinction. GIA measures a D-to-Z diamond’s degree of colorlessness against masterstones under controlled lighting and precise viewing conditions.

Instead, grading assesses transparency or opacity along with traditional clarity grading. The D-to-Z system does not grade a visibly white, milky Fancy-color appearance.

Comparison Point Colorless Diamond Commonly Called “White” True Fancy White Diamond
Basic appearance Colorless, often compared with a drop of pure water. Milky, snowy, translucent, porcelain-like or opalescent.
Why it looks white Nothing interrupts light passing through the diamond. Sub-microscopic inclusions scatter light within the stone.
GIA color treatment Measured for degree of colorlessness on the D-to-Z scale. Handled as a Fancy color diamond, not a D-to-Z diamond.
Face-up effect Clear and colorless. May show flashes of color and a weak opal-like effect.

Marketing language is where confusion often begins. Each can be natural, but natural colorless diamonds and natural Fancy white diamonds arrive at their white-looking appearance through different optical mechanisms.

For shoppers comparing descriptions, the distinction above separates colorlessness from a white Fancy-color appearance. A stone’s label therefore needs to distinguish a colorless grade from the Fancy white designation, rather than relying on the word white alone.

Rarity is also discussed differently for the two groups. Within D-to-Z, the relationship described earlier applies. Fancy white diamonds sit outside that framework, so the D-to-Z relationship should not be used as a value rule for them.

That scarcity evidence describes the Fancy-color category, not an interchangeable grade with colorless diamonds.

What Causes White Diamonds?

These inclusions shape the diamond’s appearance. Their collective effect changes the diamond’s face-up look.

Rather than producing a single spectral color, the scattered light gives the diamond a white appearance, since white is the sum of all colors. As a result, the stone can look translucent, snowy, porcelain-like, or like transparent milk instead of clear.

Under ordinary magnification, the individual inclusions responsible for this effect may remain beyond clear separation. Their size is why scientists often use electron microscopes when studying Fancy white diamonds. When light encounters this submicroscopic internal structure, it is scattered rather than passing through without interruption, creating the characteristic cloudy glow. Some descriptions call that glow opalescent, a term that captures both the whiteness and the occasional color flashes visible face-up.

Electron-microscope study helps examine inclusions that conventional optical methods cannot readily distinguish. Unlike Fancy colors associated with non-carbon elements or atomic-level defects, Fancy white diamonds derive their visible whiteness from light scattering caused by these submicroscopic inclusions. That distinction explains why the appearance can range from milky and translucent to more strongly opaque, rather than behaving like a uniform pigment. Grading also considers transparency or opacity.

Consequently, the white effect is an internal optical result, rather than a color created by non-carbon elements or atomic-level defects. A Fancy white diamond’s visual character depends on how that scattered light presents across the stone when viewed face-up. Yet the core cause remains the same: tiny inclusions disperse light inside the diamond.

In practical terms, that mechanism accounts for the soft, cloudlike whiteness that gives these gems their distinctive appearance. Viewed together, the milky body, translucent quality, porcelain-like glow, and possible flashes of color all stem from light scattering within the stone.

Accordingly, the defining visual trait is not external whiteness but the way internal inclusions redirect light through the diamond itself to viewers. Beyond their size, the inclusions are defined here by their optical effect: scattering light sufficiently to create visible whiteness.

Are White Diamonds Natural?

Natural Fancy white diamonds occur, but they are uncommon. Their status as natural diamonds applies to the rare stones recognized with a Fancy white appearance. For readers asking, “Are white diamonds natural?”, the answer is yes: GIA has examined true white diamonds, including specimens that came from the Panna mine in India.

Rarity is reflected in the limited number of such diamonds reaching grading laboratories. Actual Fancy white diamonds fall within that rare Fancy color category, according to Natural Diamonds. Fewer than 2,000 natural Fancy white and black diamonds combined had been submitted for grading since 2008. Those submission figures cover both color categories, rather than providing a separate total for Fancy white diamonds.

Among natural white diamonds, 82% are type IaB, a subset of a rare diamond type, Natural Diamonds reports. Separately, the publication says most type IaB diamonds formed more than 150 miles below Earth’s surface. Most people do not know these diamonds exist, and Natural Diamonds says there are no famous examples. GIA’s illustrations of the category include a 1.57-carat marquise-shaped Fancy white diamond and a 2.11-carat pear-shaped Fancy white diamond from the Aurora Butterfly of Peace.

Unlike many Fancy diamond colors, Fancy white diamonds have a particularly unusual treatment and laboratory-grown context. Natural Diamonds says no known method or treatment can mimic their appearance. Fancy white lab-grown diamonds have never been observed, according to the same publication. Treatments used to alter diamonds to green, pink, blue, yellow, and almost every color in between are distinguishable from natural diamonds, Natural Diamonds says.

Consequently, a true Fancy white diamond occupies a narrow natural-diamond category rather than a broad marketing description. Recognition depends on its Fancy color classification. That grading approach places the stone outside the D-to-Z color scale used to measure colorlessness.

Because white is the sum of all colors rather than a visible spectrum color, GIA treats the visibly white appearance as distinct from colorlessness. Shoppers who encounter one should consider themselves fortunate because these diamonds are infrequently submitted to GIA. Together, the rarity evidence, the recorded submissions, and the unusual treatment and laboratory-grown record frame natural Fancy white diamonds as an uncommon part of the Fancy-color diamond category.

How Fancy White Diamonds Are Graded

Their visibly white, milky or opalescent appearance places them outside a system designed to measure colorlessness.

Rather than assigning a white diamond a D-to-Z letter grade, GIA treats diamonds with colors outside that range as having distinct colors. That comparison measures how closely a stone approaches colorlessness. White Fancy diamonds do not belong in that framework because their appearance is white rather than colorless.

What the Fancy Color Grade Addresses

For Fancy white diamonds, GIA also considers appearance characteristics alongside clarity. Alongside clarity, GIA considers those appearance characteristics when grading a stone whose color is not evaluated by its absence of tint. Unlike a D-to-Z color grade, the Fancy color approach applies to a diamond that visibly falls beyond the near-colorless and colorless range. Each assessment therefore considers more than the degree of colorlessness used for an ordinary colorless diamond.

Determining a Fancy color diamond’s color grade is challenging because several factors are involved. In a Fancy white diamond, the assessment addresses the stone’s white appearance and its transparency or opacity, rather than comparing it solely against colorless masterstones. Because a Fancy white diamond can look translucent, milky or opalescent, its grade needs to account for an appearance that operates differently from colorlessness. Such evaluation preserves the distinction between Fancy color and colorless grading.

Readers comparing descriptions of white and colorless diamonds should separate casual jewelry language from the Fancy color classification. In ordinary jewelry use, “white diamond” can refer to a colorless diamond. A listing that uses that wording does not, by itself, identify a diamond as a Fancy white stone with a milky or opalescent appearance.

By contrast, the Fancy white label refers to the distinct white appearance evaluated outside the D-to-Z system. That distinction keeps colorlessness and visible whiteness from being treated as the same quality. Consequently, grading language matters: D-to-Z describes the degree of colorlessness, while Fancy white identifies a diamond whose white appearance calls for Fancy-color assessment in the market.

White Diamond Price per Carat and Value

Fancy white diamonds do not have a single price-per-carat figure that can stand in for their value. Their scarcity and distinctive appearance make broad comparisons with ordinary colorless diamonds unreliable. Any value discussion must first separate a true Fancy white diamond from the colorless stones commonly sold as white diamonds.

Why a Single Figure Misleads

Colorless diamonds provide only a limited reference point. As noted above, this is a colorless-diamond grading principle. That principle applies to colorless-diamond grading, not as a ready-made pricing rule for a visibly milky or opalescent Fancy white stone. Instead, the visual character that makes a true white diamond distinctive is also the reason it should not be treated as simply another D-F diamond with a higher or lower price.

Listings can create the central source of confusion. Many diamonds described in jewelry as white are D-F colorless diamonds, and greater colorlessness is generally associated with rarity and expense when all else is equal. By contrast, a true Fancy white diamond has a distinct face-up appearance. Buyers comparing these categories should therefore treat the word “white” as a description requiring context, rather than as proof that two stones belong to the same category or should command comparable values.

Natural origin adds another reason not to collapse these categories into one price conversation. The rarity of actual Fancy white diamonds is another consideration. Moreover, it reports that no known treatment can mimic their appearance and that Fancy white lab-grown diamonds have never been observed. Those points describe rarity and identity, but they do not convert into a universal per-carat value.

Clear terminology protects the comparison: use colorless for an untinted D-to-Z diamond and Fancy white or opalescent for the rare diamond with a visibly white appearance. Only after that distinction can a buyer make a fair like-for-like value comparison.

How to Use White Diamond Terminology

Use “white diamond” as a broad jewelry term unless the wording identifies a Fancy white or opalescent appearance. Reserve “true white diamond” for a visibly white Fancy-color stone, rather than every colorless diamond that may be called white.

Retailers, sellers, and casual conversation often use the same phrase for two different ideas. That overlap makes the distinction a terminology question before it is anything else. A colorless stone belongs in the D-to-Z color range, while Fancy white describes a different visible appearance. Because the names can be confused, read the description for the words “Fancy white,” “natural white,” or “opalescent.” Specific wording matters more than a headline or a casual sales label.

Follow this short sequence when reading a listing, product description, or conversation about a diamond, especially when the wording is brief or promotional.

  1. Read the color wording first. A diamond described as colorless, or placed on the D-to-Z scale, uses white in the common jewelry sense.
  2. Look for language describing that appearance. Those descriptions point to the visual character associated with a Fancy white diamond.
  3. Treat “white diamond” by itself as incomplete terminology, not as a statement that the diamond is Fancy white.
  4. Use the fuller name, “Fancy white diamond” or “opalescent diamond,” when referring specifically to that uncommon category.

Descriptions can also include a modifier or secondary color, such as red, blue, yellow, brown, or black. Terms of that kind describe a Fancy white diamond’s appearance more precisely than the standalone word “white.” Colorless is not a synonym for Fancy white in gemological use.

If a stone is described only as a white diamond, keep the phrase broad rather than assuming it identifies a Fancy white stone. Instead, ask which meaning the seller intends: colorless or visibly milky and opalescent.

Natural white diamonds are also called opalescent diamonds, so that word is useful when the intended meaning is the rare Fancy-color appearance. Clear terminology helps keep a common jewelry label separate from a distinct Fancy-color description. Both meanings remain useful when description makes intended sense plain.

This guide does not rank diamonds by price because the name comes before any value comparison.

Frequently Asked Questions

Is a White Diamond the Same as a Colorless Diamond?

No. In everyday jewelry language, “white diamond” often means a colorless diamond in GIA’s D-to-Z range, commonly a D-F diamond. A true Fancy white diamond has a visibly milky, translucent or opalescent appearance and is not colorless.

What Causes a True White Diamond to Look Milky?

These inclusions create its milky, snowy, porcelain-like or opalescent face-up appearance, sometimes with flashes of color.

Why Should Buyers Look for Fancy White or Opalescent Wording?

That wording helps distinguish a rare, visibly white Fancy-color diamond from a colorless diamond marketed as white. A true Fancy white diamond can look milky, translucent or opalescent because sub-microscopic inclusions scatter light, while a colorless diamond is graded on GIA’s D-to-Z scale.

Are Fancy White Diamonds Graded on the D-to-Z Scale?

No. GIA’s D-to-Z scale measures the degree of colorlessness in diamonds, while a Fancy white diamond visibly has a white Fancy-color appearance. Fancy white diamonds are graded as Fancy color diamonds, with transparency or opacity assessed alongside traditional clarity grading.

What Is the Price of a White Diamond?

Greater colorlessness generally makes a colorless diamond rarer and more expensive when all other factors are equal. That principle does not serve as a price guide for true Fancy white diamonds, which are a separate Fancy-color category.

Can a Lab-Grown Diamond Be a Fancy White Diamond?

Natural Diamonds states that Fancy white lab-grown diamonds have never been observed. It also says no known treatment can mimic the appearance of a Fancy white diamond, unlike processes that can alter diamonds to green, pink, blue, yellow and other colors.

A white diamond can mean two very different things. Most often, the phrase describes a colorless diamond graded on the D-to-Z scale, while a true Fancy white diamond is an uncommon natural diamond with a milky or opalescent look created by light-scattering sub-microscopic inclusions. Shoppers should look beyond the casual “white diamond” label and distinguish a colorless D-F stone from a diamond identified as Fancy white or opalescent.

References

Sources read in September 2026.

Eric Dawson

I'm Eric Dawson, and I write The Money Watch from north Columbus, Ohio. Most of what I cover comes from my own life: renting, a 2014 Honda Fit, parking, computers, food and the bills behind all of it. I spent four years in an apartment-property office and eleven on a distributor's operations desk, reading leases and invoices. Where you need real information, I research the maker's or agency's own page and independent sources and report what they publish. I don't give tax, investment, legal or medical advice.