Lapis lazuli is composed of several minerals in small quantities - augite, calcite, diopside, mica, hauynite, hornblende, pyrite. Because of this some...
Larimar is a rare blue variety of pectolite found only in the Dominican Republic. Its distinctive sky-blue color comes from copper substitution in the...
Lazulite is a compact, pleochroitic mineral which forms a series to scorzalite. It is dichroic, with a monoclinic crystal system. It appears as poin...
Malachite is a bright green, basic copper carbonate. It appears as fibrous, radiating aggregates with silky to dull luster, and its crystals are adam...
Meerschaum is a clay-like hydrous magnesium silicate. It has no crystals, and occurs as earthy aggregates, porcellanous masses, nodular, and porous. I...
Microcline is a silicate of potassium and aluminum, and an alkali member of the feldspar group. It is the phase of this compound that is stable at low...
Milky Quartz is a milky white translucent to opaque variety of crystalline quartz of somewhat greasy luster. It is the commonest variety found in pegm...
No, despite its name, Moldavite isn't some fancy green mold growing in a cave! Moldavite is a forest-green tektite formed by a meteorite impact around...
The variety name Moonstone is usually used to describe an optical effect and unlike most variety names it is not confined to a single species (The ter...
Morganite is a pale red-purple, rose, salmon to purplish red, slightly pink, cesium-bearing variety of Beryl. The Beryl group of silicates includes t...
