1. Baryte, barite or barytes is a mineral consisting of barium sulfate. Baryte is generally white or colorless, and is the main source of the element barium. The baryte group consists of baryte, celestine, anglesite, and anhydrite. Baryte and celestine form a solid solution SO? 2. Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases, is an opaque, impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. 3. Obsidian (/?b?s?di?n/) is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. ... Obsidian is hard, brittle, and amorphous; it therefore fractures with sharp edges. 4. Micas are a group of minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into extremely thin elastic plates. This characteristic is described as perfect basal cleavage. 5. Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. ... Sandstone is converted into quartzite through . 6.Copper Ore- Green and blue stains on rock outcrops, known as copper bloom are a guide to copper. Sometimes used like turquoise for jewelry. 7.Polished Gemstone - The silica group consisting of quartz, agate , obsidian, petrified wood, etc. furnish most of the semi-precious gemstone supply. Gemstone material must be colorful,relatively hard and capable of taking a high polish. 8. Turritella Agate is the popular name used for a brown, translucent to semi-transparent, fossiliferous agate found in the Green River Formation of Wyoming. It is very easy to recognize because it contains large fossil snails that stand out in a white-to-tan color that contrasts with the brownish agate. 9. Petrified wood is the name given to a special type of fossilized remains of terrestrial vegetation. Petrifaction is the result of a tree or tree-like plants having been replaced by stone via a mineralization process that often includes permineralization and replacement. 10.Pyrite, also called iron pyrite or fool's gold, a naturally occurring iron disulfide mineral. ... The name comes from the Greek word pyr, ?fire,? because pyrite emits sparks when struck by metal. Pyrite is called fool's gold; to the novice its colour is deceptively similar to that of a gold nugget. 11. Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. ... Pure fluorite is transparent, both in visible and ultraviolet light, but impurities usually make it a colorful mineral and the stone has ornamental and lapidary uses. 12. Travertine (/?trav?r?ti?n/ TRA-v?r-teen) is a form of limestone deposited by mineral springs, especially hot springs. ... Travertine is a terrestrial sedimentary rock, formed by the precipitation of carbonate minerals from solution in ground and surface waters, or geothermally heated hot-springs. Original box has some signs of use such as Discolorations marks .