sunstone
Noun: A variety of feldspar, specifically oligoclase, that contains small, flat, reflective inclusions (typically hematite or goethite). These inclusions create a bright, spangled or glittering optical effect, often with a reddish or golden sheen, known as aventurescence. It is a semi-precious gemstone.
"Sunstone" is used as a countable noun to refer to this specific type of mineral or gemstone. It is typically used in geological, mineralogical, and jewelry contexts.
- Geologists identified the specimen as sunstone due to its distinctive aventurescence.
- She wore a beautiful pendant made of sunstone that sparkled in the light.
- The primary source for high-quality sunstones is Southern Norway.
- As a modifier: "Sunstone" can be used attributively to describe other nouns.
- The artisan crafted a sunstone bracelet.
- They visited a sunstone mine during their trip.
- Aventurine Feldspar: A technical synonym for sunstone.
- Oligoclase: The specific type of feldspar to which most sunstone belongs.
- Aventurescence: The optical phenomenon (glittery effect) exhibited by sunstone and aventurine quartz.
- Aventurine feldspar
- Heliolite (an archaic term)
The provided reference context describes "a translucent quartz spangled with bits of mica." This is technically a description of aventurine quartz (or just aventurine), not sunstone. While both stones exhibit aventurescence, sunstone is a feldspar, not quartz. This is a common point of confusion. The definition above is the correct and primary meaning for the gemological and mineralogical term "sunstone."
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a translucent quartz spangled with bits of mica or other minerals
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