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Feldspar (Moonstone
Orthoclase species (Moonstone’s adularescence is…
Feldspar
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Labradorite
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#1 Type: blue & green flashes of spectral color, found in Labrador, Canada
#2 Type: multicolored adularescence w/ light bodycolor, found in Madagascar, know as "rainbow moonstones"
#3 Type: Brilliant spectral colors in yellow, orange red and blue & green, found in Finland
The most prized labradorite is “spectrolite,” a phenomenal labradorite with brilliant spectral hues.
- Mohs scale: 6
- Cleaves easily & has two cleavage directions
- Often used as a carving material
Sunstone
Oregon Sunstone
- A transparent feldspar w/ copper inclusions
- Can be either bicolored or tricolored
- Not treated, a feature that producers use as a selling point
- Price: 2 cts - 5 cts --> $45 to $150 (commercial), $425 to $500 (fine quality)
- Color Range: yellow, orange & brown bodycolor, not all sunstones are aventurescent
- If aventurecence is present, it called aventurine feldspar
Small inclusions give sunstone a reddish or golden sheen, while larger inclusions create glittering reflections.
Scarcity and the unpredictable availability of its different color varieties make sunstones challenging to market
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Amazonite
- Color Range: light green to greenish blue hues
- Mohs scale: 6
- Cleaves easily & has two cleavage directions
- Source: Brazil, India, Madagascar, Norway, Russia & the US
Feldspars Quality
- the most widespread minerals on earth
- Basic chemical: aluminum, oxygen & silicon
- Feldspars members vary in chemical composition or crystal structure
Orthoclase & Microcline -- Contain potassium
Labradorite, Andesine & Oligoclase -- Contains a mixture of calcium and sodium