Black+Opal



Black Opal
NOT ACTUALLY BLACK!!!!

edited by Kenzie Ferris

 * Chemical Formula** SiO2 n(H2O)


 * Color** Green, Blue, Purple, Yellow,and Black


 * Halite Glassy**


 * Density 1.9-2.3, Average: 2.09**

**Used For Cosmetics**

 * It is found in Nevada and is mined out of a mountain near Las Vegas.**
 * Black opal is the birth stone of October. It is also the stone given to**
 * celebrate the 14th year of marriage.**

Opal is formed from a solution of silicon dioxide and water. As water runs down through the earth, it picks up silica from sandstone, and carries this silica-rich solution into cracks and voids, caused by natural faults or decomposing fossils. As the water evaporates, it leaves behind a silica deposit. This cycle repeats over very long periods of time, and eventually opal is formed. this process takes 1000s or even 100,000,0s of years, but by using technology an Australian man did it in a few months and roast.

By: Lizbeth De La Torre By: Chay Cox by jiovanni raviolo