Obsidian is a natural volcanic glass that forms when lava solidifies so rapidly that mineral crystals do not have time to grow. Its color is usually black, but sometimes with the presence of hematite (iron oxide) it can be Indian red to brown. Obsidian has a bright, vitreous luster on smooth surfaces, and is sometimes... Read More
There are two different minerals known as jade.  They are "nephrite", which is an amphibole, and "jadeite," which is a pyroxene.  Nephrite is the most common and widespread.  It is formed of a mat of tightly interlocking fibers, creating a stone tougher than steel.  It was used in China and New Zealand for tools and... Read More
Moonstone is a potassium feldspar of the orthoclase (adularia) species with white shimmer, similar to moonshine (therefore the name) adularescence. It is a member of the feldspar group of gems. It can be transparent with a strong blue schiller on the surface; or it can have a striking cat’s eye or star effect. Moonstone’s shimmer... Read More
Malachite is a common secondary mineral with a vivid green color; formed by the gathering of copper deposits, where it is usually accompanied by lesser amounts of azurite, that have a deep azure blue color. It is normally found in opaque green masses that are granular, knobby, and massive. Malachite’s name derives from the Greek... Read More
Lapis lazuli
 Lapis lazuli has an intense, brilliant blue that derives from the presence of the mineral lazurite. Its name derives from the Arabic word lazaward, meaning heaven or sky, and Persian word lazhuward, meaning, “blue stone.” It is composed of several minerals in addition to lazurite, like - augite, calcite, diopside, enstatite, mica, hauynite, hornblende, nosean,... Read More
Labradorite is a colorful stone that offers a range of colors and optical effects. It is named after its source the Peninsula of Labrador in Canada, where it was found. Labradorite displays a metallic rainbow effect similar to that of black opal except with larger color spots, often blue and green, although specimens with the... Read More