Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Certified Gemstone




This is a parcel of natural untreated rough specimens from Tanzania Africa

.It is also known as Labradorite feldspar.

Weight of parcel 210.10 cts app

Size of largest  31 x 23 x 17 mm app

This is specimen value and if you would like some better quality material visit our sister site QUALITY ROUGH

Sunstone is a plagioclase feldspar, which when viewed from certain directions exhibits a brilliant spangled appearance; this has led to its use as a gemstone. It has been found in Southern Norway, and in some United States localities. It is the official gemstone of Oregon.

GRADING The first factor in grading is the amount of Schiller[a sub -surface iridescent shimmer]The more schiller the less the stone reflects and shimmers as it blocks suns rays.The next grade is for colour as it can be found in red ,green.yellow,pink and orange.

Sunstone with high amounts of schiller are great for carvings.

The optical effect appears to be due to reflections from enclosures of red haematite, in the form of minute scales, which are hexagonal, rhombic or irregular in shape, and are disposed parallel to the principal cleavage-plane. These enclosures give the stone an appearance something like that of aventurine, whence sunstone is known also as "aventurine-feldspar." The optical effect called shiller and the color in Oregon Sunstone is due to copper. In the middle part of this crystal, it sparks a lot, and usually has a dark color in the middle, and the color becomes lighter as it becomes the outer part.


1 bid placed so far
$22.00 grohegirl2
7th Apr 2017 4:55am PDT
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Pricing & Details

Bid Increment $1.00
Starting Bid $20.00
Auction ID 253937
Watchers 0 watching
Viewed 752 times
Starts 5th Apr 2017 5:02pm PDT
Ends 7th Apr 2017 4:55am PDT

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