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  3. Lapis Vs Sodalite

Lapis Lazuli vs Sodalite: How to Tell the Two Blue Stones Apart

By Digital Towns Crystals · Last reviewed October 8, 2026

Short answer: look for gold. Lapis lazuli is a rock made mainly of royal-blue lazurite with white calcite and brassy pyrite flecks; sodalite is a single mineral, a darker, inkier blue with white veins and essentially no pyrite. Lapis is also noticeably heavier (specific gravity 2.7 to 2.9 against about 2.3) and leaves a light blue streak where sodalite leaves white. Sodalite often glows orange under UV light; lazurite does not. Sodalite costs a fraction of good lapis, which is why it gets passed off as lapis.

Is lapis lazuli just expensive sodalite?

No, but the two are relatives, and lapis often contains a little sodalite. The difference is that one is a rock and the other is a mineral.

GIA describes lapis as an aggregate of several minerals, with lazurite, calcite and pyrite as the three major ones, and credits lazurite with the gem's most prized bright royal blue (GIA, lapis lazuli). Geology.com adds a working definition: to be called lapis lazuli, a rock must have a distinctly blue color and contain at least 25% blue lazurite (Geology.com, lapis lazuli). Lazurite, haüyne, nosean and sodalite all belong to the sodalite group, and the International Gem Society notes that lapis is a rock made up principally of these materials (International Gem Society, sodalite).

Sodalite, the stone sold under its own name, is a sodium aluminum silicate with chlorine, Na8Al6Si6O24Cl2. Geology.com explains that it crystallizes from sodium-rich magmas so low in silica that quartz and feldspar are often absent, in rare rocks such as nepheline syenite (Geology.com, sodalite). Lapis forms in a completely different setting: near igneous intrusions where limestone or marble has been altered by contact metamorphism. That is why lapis comes with calcite and pyrite, and sodalite comes with nepheline.

How can you tell lapis from sodalite in a few minutes?

Run these in order. The first two are free and need only good light.

1. Hunt for pyrite

Tilt the stone under a lamp and look for tiny gold sparks. Geology.com's sodalite page is explicit: if significant pyrite is present, the specimen is not sodalite. Most lapis has at least a few flecks; fine Afghan material may have many. One caution: top-grade lapis can be nearly pyrite-free, so the absence of gold does not prove sodalite, but the presence of gold all but rules it out.

2. Judge the blue and the white

Geology.com notes that sodalite is differentiated from lapis by its darker blue color as well as the absence of pyrite. Lapis tends toward a saturated royal or ultramarine blue, sometimes slightly violet; sodalite looks deeper and grayer, like blue-black ink, often with patches of gray. Look at the white too. In lapis, white calcite usually appears as mottled patches or soft clouds; in sodalite, white tends to run as sharper veins and streaks through the blue.

3. Weigh it

This is the most underrated test. The IGS gives gem lapis a specific gravity of 2.7 to 2.9, or higher if much pyrite is present (International Gem Society, lapis lazuli), while massive blue sodalite sits around 2.28. Same size, lapis is roughly a fifth heavier. A specific gravity check with a kitchen scale and a cup of water turns that into a number.

4. Shine a UV flashlight on it

Geology.com notes that sodalite often produces a weak orange fluorescence under shortwave or longwave ultraviolet light, and Minerals.net describes it as often fluorescent creamy white, yellow or orange under shortwave (Minerals.net, sodalite). Webmineral lists lazurite itself as non-fluorescent (Webmineral, lazurite). So orange spots or veins under a UV torch suggest sodalite, either as the whole stone or as a component of a lapis rock. See the UV testing guide for torch choice and safety.

5. The streak (only on rough or a hidden spot)

Rub an unpolished corner on the back of an unglazed tile. Minerals.net gives lazurite a blue streak and sodalite a white one, and the IGS notes that natural lapis should leave a light blue streak. It is a destructive test, so skip it on finished pieces.

Lapis lazuli and sodalite by the numbers

Property Lapis lazuli Sodalite
What it is Metamorphic rock, at least 25% lazurite Single mineral, feldspathoid group
Main components Lazurite, calcite, pyrite (plus diopside, mica, sodalite) Sodalite, often with calcite veins
Blue tone Royal to ultramarine, even Darker blue to blue-violet, often grayish
Gold flecks Pyrite common Essentially none
Specific gravity 2.7 to 2.9 (pure lazurite 2.38 to 2.45) 2.14 to 2.40, massive about 2.28
Mohs hardness Varies, 3 (calcite) to 5.5 (lazurite) 5.5 to 6
Streak Light blue White
UV reaction Lazurite inert Often orange fluorescence
Refractive index About 1.50 1.483 to 1.487
Common treatments Dyeing (common), wax and oil Dyeing of pale material, heat

Sources: Geology.com, GIA, Minerals.net, Webmineral and the International Gem Society.

What about dyed lapis and "Swiss lapis"?

Dye is the bigger buying problem than sodalite. Geology.com notes that much of the lapis entering the market has been treated with a blue dye to hide its white calcite, then treated with wax or oil to improve luster and seal the dyed calcite. The IGS lists dyeing as common, alongside heat treatment, fracture filling and wax and oil impregnation.

Lapis also has outright stand-ins. The IGS names enamel, glass, plastic and a variety of dyed stones such as howlite and jasper, the latter misleadingly called "Swiss lapis." It also notes that lapis has been synthesized, by Pierre Gilson in France and Carroll Chatham in the United States. And it calls sodalite the only natural gemstone readily available in large enough sizes and a deep enough blue to be a convincing lapis simulant.

Practical signs of dye: blue color concentrated in cracks and pits, a uniform blue with no calcite at all in a cheap piece, or color that rubs off on a damp white cloth. The dyed stones guide covers the method in detail.

Where is each one mined?

Lapis has one dominant source. Geology.com calls Afghanistan the world's leading source, with some areas mined for thousands of years, and lists Chile, Russia, Canada, Argentina and Pakistan as other notable producers. Minerals.net adds a mineralogical twist: at Sar-e Sang in Afghanistan's Kokcha Valley, the "lazurite" has been determined to be haüyne, though the trade still calls it lazurite (Minerals.net, lazurite). The same Sar-e-Sang mines are also the premier locality for sodalite crystals, according to Minerals.net, so both minerals can come out of one deposit. Chilean lapis is typically paler and calcite-rich; the IGS notes that once-unsalable Chilean material now sells well as "denim lapis."

Sodalite comes from alkaline igneous provinces. The IGS notes that Canada produces large amounts, with Bancroft, Ontario turning out massive, deep blue material, and that Ohopoho in Namibia yields extremely intense, solid blue material. Minerals.net names the Princess Mine in Dungannon Township, Ontario, Poços de Caldas in Brazil, and in the US Litchfield, Maine and Magnet Cove, Arkansas. Our Afghanistan origin guide covers the Badakhshan mines in depth.

How do prices compare?

Sodalite is the budget blue. Geology.com calls it one of the only vivid blue materials still sold at a reasonable price, and a less costly alternative to lapis lazuli. Its value depends mostly on depth of color and how much white and gray it carries.

Lapis spans a wide range. Geology.com notes that solid blue, or solid blue with a few grains of gold pyrite, is the most desirable color, and that calcite veins, mottling or large patches reduce desirability. Heavy pyrite also lowers value for most buyers. A sphere or tower of even, deep blue Afghan lapis can cost several times a sodalite piece of the same size, which is exactly why mislabeling pays.

Which should you buy for what?

  • For the classic "night sky" look with gold flecks: lapis, and ask for the origin and whether it is dyed.
  • For a large, affordable blue carving or a tumble jar: sodalite. It gives a deep blue for far less money and is slightly harder than the calcite-rich parts of lapis.
  • For UV fun: sodalite, or a lapis rock that contains a fluorescent component. Our stock includes a lapis palm stone sold as UV reactive.

In crystal traditions both stones are associated with communication and the throat chakra, which keeps them side by side on shop shelves. The lapis lazuli guide and sodalite guide cover each stone's history and traditions.

Shopping lapis and sodalite we stock

Ask three questions of any blue listing: does the photo show pyrite, does the stated weight fit the size, and does the seller name an origin? Afghan origin on lapis is normal and expected; a "lapis" with no pyrite, a dark inky tone and a low price deserves a second look.

  • Lapis Lazuli Polished Sphere Sculpture: an 80 mm, 675 to 712 gram sphere from Afghanistan. That works out to a specific gravity of roughly 2.5 to 2.65, well above the roughly 610 grams an 80 mm sodalite sphere would weigh, which makes it a handy benchmark.
  • Lapis Lazuli Obelisk Tower, deep blue: Afghan lapis cut tall, good for seeing pyrite and calcite distribution across flat faces.
  • Lapis Lazuli (UV reactive) Palm Stone: since lazurite itself is inert, the glow comes from another mineral in the rock; a fun piece for the UV test.
  • Sodalite sphere: a polished sodalite sphere with the white calcite veining typical of the stone.
  • Sodalite: a larger sodalite piece for comparing the darker, grayer blue against lapis side by side.

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Frequently asked questions

Is sodalite fake lapis?

Sodalite is a genuine natural mineral, not a fake. It becomes a problem only when it is sold as lapis lazuli. The IGS calls it the only natural gemstone available in large enough sizes and a deep enough blue to be a convincing lapis simulant, so check for pyrite, weight and streak.

Does sodalite have gold flecks?

Essentially no. Geology.com states that if significant pyrite is present, a specimen is not sodalite. Gold pyrite flecks are a hallmark of lapis lazuli. Some top-quality lapis has little or no pyrite, so the absence of flecks does not prove sodalite, but their presence points strongly to lapis.

Why does my lapis glow under UV light?

Lazurite, the blue mineral in lapis, is listed as non-fluorescent by Webmineral. A glow therefore comes from another mineral in the rock, and sodalite, which often fluoresces orange, is a common candidate. Lapis is a mixture, so a UV-reactive piece can still be genuine lapis containing a fluorescent component.

Which is heavier, lapis or sodalite?

Lapis. Gem lapis has a specific gravity of about 2.7 to 2.9, higher with lots of pyrite, while massive sodalite is around 2.28. Two pieces of the same size differ by about a fifth in weight, which a kitchen scale and a cup of water can confirm.

How can I tell if lapis is dyed?

Look for blue concentrated in cracks, pits and calcite patches, an unnaturally uniform color, or blue that transfers to a damp white cloth. Geology.com notes that much lapis is dyed to hide white calcite and then waxed or oiled. A reputable seller should disclose dyeing.

Sources