Petra Brixi
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Oregon Sunstone

Oregon Sunstone: One significant source of sunstone is Oregon, USA where it is the official state gem. Small mines in Oregon produce a range of material in various colors including peach, green, and red as well as dichroic specimens.

Pyroxene

The pyroxenes (commonly abbreviated to Px) are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks.