Sapphire 4-12mm Graduated Faceted Oval - 17 Inch featured_07052024 Biotite is a name used

Biotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks

These gauges are often used to display dimensional information in science & engineering but is convenient for creative use as well

Multi-colored Jasper is believed to carry the properties of its dominant color

It is extremely tough and resistant to fracture and has been used to make choppers and blades since Neolithic times

Sapphire 4-12mm Graduated Faceted Oval - 17 Inch featured_07052024 Biotite is a name usedSapphires are precious gemstones, but unlike rubies, they come in a rainbow of colors besides red! They are all varieties of the mineral corundum, known for its incredible hardness, second only to diamond . This makes sapphires very durable and scratch resistant. Formed deep underground during the cooling of magma, sapphires get their various colors from trace elements. Iron gives them blue, the most famous sapphire color, while titanium can create