Lapis Lazuli

Lapis Lazuli is a feldspathoid mineral recognized among collectors for its crystal form and distribution.

About Lapis Lazuliextended article

Lapis Lazuli Guide: History, Properties and Collecting

Lapis lazuli is a deep blue metamorphic rock composed primarily of lazurite, with variable amounts of calcite, pyrite, and other minerals. Prized for over 6,000 years, lapis was one of the first gemstones to be mined and traded across the ancient world. Medieval European painters ground lapis into ultramarine pigment, the most expensive paint color of the Renaissance.

What Makes Up Lapis Lazuli

Lapis lazuli is technically a rock rather than a single mineral. Lazurite provides the deep blue color from sulfur trapped in the crystal structure. Calcite appears as white streaks. Pyrite creates the characteristic golden metallic flecks. The finest lapis contains minimal calcite, intense uniform blue lazurite, and well-distributed pyrite specks.

Where Lapis Lazuli is Found

Afghanistan’s Badakhshan Province has been the premier source for over 6,000 years. The mines of Sar-e-Sang produce the world’s finest material. Chile produces lighter blue material. Russia’s Lake Baikal region yields good-quality lapis. Afghan lapis remains the global standard.

Collecting Lapis Lazuli

Raw lapis specimens are collected for their natural beauty and geological interest. When purchasing, examine under good lighting for uniform color distribution. Lapis rates 5 to 6 on Mohs scale and should be protected from acids. Explore our blue crystal collection for related minerals.

About Lapis Lazuli

Lapis Lazuli is classified as a feldspathoid mineral in the sodalite group (lazurite component) and has the chemical formula Rock: Lazurite Na7Ca(Al6Si6O24)(SO4)(S3)·H2O + Calcite CaCO3 + Pyrite FeS2. It crystallizes in the isometric system and holds a steady position among feldspathoid species. Its combination of structural character and global distribution make it a recognized species in both systematic and aesthetic collections.

Identification & care

Crystals commonly develop as rock — massive aggregates; lazurite dodecahedral crystals are rare standalone specimens. Its color range is broad, including deep intense blue, violet-blue, gold pyrite flecks, and white calcite streaks. The luster is dull to waxy on polished surfaces, the streak is blue to pale blue, and specimens are typically opaque. The cleavage is n/a (rock). The fracture is uneven (rock), which aids identification.

Collector context

How it forms

The geological setting for Lapis Lazuli is typically high-grade regional metamorphism of evaporite-bearing limestone sequences (meta-evaporites); requires calcium, sodium, sulfur, and aluminum-rich protolith. It is commonly found in association with calcite, pyrite, diopside, albite, afghite, wollastonite, scapolite.

Why collectors care

Lapis Lazuli is a frequently-sought species in serious collections because its habit is recognizable, its color often strong, and its best examples unmistakable even at a distance. Chinese material has driven much of the recent visual shift in the species — sharper crystals, deeper colors, cleaner matrix.

What affects value

Value in Lapis Lazuli is assessed, in typical order of weight, against: (1) locality provenance; (2) size relative to the species norm; (3) crystal form and termination sharpness; (4) color saturation and zoning; (5) transparency and internal clarity; (6) matrix quality and aesthetic balance; (7) condition (absence of damage, chips, or repair). Cleaning quality and verified locality documentation act as multipliers across the above.

Naming history

The name Lapis Lazuli has a specific etymological and historical context — see Mindat's reference entry for provenance details. We have retained naming data at the record level; published prose is paraphrased from factual fields rather than copied from source.