Cleavage: Hardness: Color: Luster: Name: System: Habit: SG: Notes: Imperfect in one direction (basal), may be distinct in another direction (rhombic) but usually not seen
Detailed gem and jewelry information guide about the blue gemstone turquoise: information & pictures.
Blue Gemstones & Minerals. The following is a list of Blue gems and minerals listed in our database. Click the pictures to get full data, click the X to remove the
Describes physical characteristics of minerals; color, idiochromatism, allochromatism, streak, luster, density, hardness, Mohs scale, cleavage, fracture, tenacity
May 09, 2016 · **Dark minerals are common, but purely black minerals aren’t as common**. There are many minerals out there that are gray or metallic, but this list is for
Lapis lazuli is a blue rock containing lazurite, calcite and pyrite. It has been used to make beads, gemstones and inlay for thousands of years.
Azurite is very popular mineral among collectors. Bright blue pieces are polished into cabochons and beads, and large masses are sometimes cut into ornamental objects.
Uses of Pyrite. Pyrite is composed of iron and sulfur; however, the mineral does not serve as an important source of either of these elements. Iron is typically
Jul 25, 2016 · Green and greenish rocks get their color from green minerals, but a lot depends on the type of rock: igneous rocks, sedimentary rocks and metamorphic rocks
Precious and Semi-Precious Gemstone and Mineral Glossary. Adamantine luster Refers to the diamond-like luster of a gemstone. Gemstones with a diamond-like luster