File:Pearls.jpg · Wikimedia Commons · See Wikimedia Commons
AI overview
A pearl is a lustrous gem formed inside an oyster or other shellfish when an irritant becomes coated with layers of a shiny substance called nacre. Pearls have been valued throughout history for jewelry and decoration, making them culturally and economically significant gems.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Mineral.name
- Pearl
- Mineral.image
- Various pearls.jpg
- Mineral.imagesize
- 210px
- Mineral.alt
- Various pearls
- Mineral.caption
- Various pearls
- Mineral.category
- Carbonate mineral, protein
- Mineral.formula
- Calcium carbonate, CaCO3 Conchiolin
- Mineral.strunz
- 05.8
- Mineral.color
- White, pink, silver, cream, brown, green, blue, black, yellow, orange, red, gold, purple, iridescent
- Mineral.system
- Orthorhombic
- Mineral.cleavage
- None
- Mineral.fracture
- Uneven, various
Article · 中文
珍珠，或稱真珠，是软体动物（例如牡蛎）產物，硬而圆滑。一般用於首饰、珍宝行业。
Abstract from DBpedia / Wikipedia · CC BY-SA