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Sanidine

- Formula
- K(AlSi3)O8
- Crystal System
- Monoclinic
- Crystal Habit
- Blocky, Prismatic, Massive - Granular
- Cleavage
- Perfect, Good, None
- Luster
- Vitreous - Pearly
- Color
- colorless, white, gray, yellowish white, reddish white
- Streak
- white
- Class
- Monoclinic - Prismatic
- Fracture
- Uneven
- Hardness
- 6
- WebMineral
- View Sanidine
- Mindat
- View Sanidine
Sanidine from Itrongay, Betroka dist., Anosy, Toliara, Madagascar

Light yellow gemmy cleaved piece of Sanidine. This is one of the few localities where you would find an occurence of gemmy Sanidine, a feldspar found in volcanic deposits.
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Sanidine from Riedener Berg, Volkesfield, Eifel, Rheinland-Pfalz, German
- Special Info
- XRD Confirmed,EDS Confirmed
Translucent gemmy mass. Verified by Dr. Igor Pekov.
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Sanidine from Penticton, Osoyoos dist., British Columbia, Canada
Large tabular dull Sanidine crystal showing Carlsbad twinning.
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Sanidine from Ariccia, Alban Hills, Rome Prov., Latium, Italy
Colorless and glassy nice crystals of Sanidine, a K-spar, which forms at high temperatures in potash-rich acid volcanics. These crystals are about 1-5mm.
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