Fourth graders at A.D. Hay Elementary in Lakeview recently visited Dust Devil Mine, an Oregon Sunstone mining operation on BLM-managed mine claims. Miner Don Bu — Photo: Bureau of Land Management Oregon and Washington from Portland, America · Public domain
Sunstone
Feldspar glittering with copper or hematite inclusions — an aventurescent gem of oligoclase or orthoclase.
Intro adapted from Wikipedia (CC BY-SA).
Sunstone is a mineral variety of Oligoclase, with the chemical formula (Ca,Na)(Al,Si)₄O₈.
It crystallizes in the triclinic crystal system.
Key properties: Mohs hardness 6–6.5; typically orange or red or brown.
Collections: Gemstones.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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