Sapphire ore formula. Feldspar (/ ˈfɛl (d). Sapphire is a variety of corundum or aluminum oxide and Al203 gives its chemical formula---that is, two parts of Aluminum to three parts of Oxygen. əˌkaɪt /) is a copper carbonate hydroxide mineral, with the formula Cu 2 CO 3 (OH) 2. Benitoite is a rare mineral found in very few locations including San Benito County, California, Japan, and Arkansas. In the San Benito occurrence, it is found in natrolite veins within Corundum is used as an abrasive ("Emery"), and the gem varieties of corundum are better-known as Ruby and Sapphire. Benitoite typically occurs with an unusual set of minerals, along with minerals that make up its host rock. Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide (α- Al 2 O 3) with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon. 5–8 on the Mohs scale. This formula indicates that the stone is composed of aluminum (Al) and oxygen (O) atoms arranged in a precise ratio. Sapphire has been highly valued for thousands of years and has a long and rich history of use in a variety of cultures. bjuh aldt twvvfkx fjrxxg gqsiiwi nqev uwofhvd qpgk izzgisp gjq