Red Andesine, Red Gemstone, Cushion Cut, Translucent , Striped Inclusions, 9 x 6 mm octagon, 1.19 ct

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$26.00
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Preparation takes 3-5 business days
Arrives from the United States
Returns and exchanges accepted
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Item details

1.19 ct
translucent banded
andesine
9x6 4mm depth
octagon

The gemstone you see here , as usual, is the gem you are purchasing.

My prices are lower than many popular and Larger jewelry and

gemstone suppliers, as well you are sure to be getting the stone

pictured. 100% guaranteed.
Each gemstone I have collected especial and some I have identified

myself out of mixed lots. Others I bought specifically with Chantaburi,

Thailand Laboratory Certificates.
Returns are accepted After you have messaged me and arranged

proper method of mailing return. You have 5 days from receipt to

inspect them, if not to your satisfaction, you then message me for a

return authorization, thus insuring I am aware the gem is again in

transit and I can follow the tracking number. Gems over 100.00
USD must be insured both ways.

In the early 2000s, a new variety of red or green gemstone resembling

sunstone and known as 'Andesine' appeared in the gem market. After

much debate and controversy, most of these gemstones, allegedly

sourced from China, were subsequently discovered by retailer JTV to

have been artificially coloured by a copper diffusion process.[2]

However, a Tibetan source of bona fide (untreated) red andesine was

eventually verified by a number of independent groups of well-

respected gemologists.[3][4][5][6][7]
The optical effect appears to be due to reflections from inclusions of

red copper, in the form of minute scales, which are hexagonal,

rhombic, or irregular in shape, and are disposed parallel to the

principal cleavage-plane. These inclusions give the stone an

appearance something like that of aventurine, hence sunstone is

known also as "aventurine-feldspar." The optical effect called shiller

and the color in Oregon Sunstone is due to copper. The middle part of

this crystal sparkles, and usually the color is darkest in the middle

and becomes lighter toward the outer edges.

The feldspar which usually displays the aventurine appearance is

oligoclase, though the effect is sometimes seen in orthoclase: hence

two kinds of sunstone are distinguished as "oligoclase sunstone" and

"orthoclase sunstone."
Category Mineral variety
Formula
(repeating unit) (Ca,Na)((Al,Si)2Si2O8)
Identification
Color Colorless, yellow, red, green, blue, and copper shiller
Crystal habit Euhedral crystals, granular
Crystal system Triclinic
Twinning Lamellar
Cleavage 001
Diaphaneity Transparent to translucent
Specific gravity 2.64–2.66
Refractive index 1.525–1.58



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Preparation takes 3-5 business days
Arrives from the United States
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I gladly accept returns and exchanges
Contact me within: 14 days of delivery
Ship items back within: 30 days of delivery
I don't accept cancellations
But please contact me if you have any problems with your order.
The following items can't be returned or exchanged
Because of the nature of these items, unless they arrive damaged or defective, I can't accept returns for:
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Conditions of return
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.