Sillimanite, named after Prof Silliman of Yale University, is blue to green, with distinct pleochroism showing pale yellowish green, dark green, and blue from different angles. Crystals with slender prisms in parallel groups, resembling fibres, the material is called Fibrolite. It is found in metamorphic rocks. Blue and violet stones are found in Burma; greenish gray in Sri Lanka and fibrolite in USA. Other sites include India, Europe and Brazil. A hard stone (7.5 MOH), it is often cut en cabochon for cat’s eye effect and made into rings.
GEMS AND GEMOLOGY
Gemology has been a fascinating hobby of mine for over 20 years, reading up “Gemstones of the World” by Walter Schumann, attending practical classes on coloured gemstones, and visiting gem mining areas. I acquired some pieces, both priced and less well known, of various colours, shapes and cuts from gem-producing areas like Burma,Sri Lanka, Thailand, Cambodia etc. These have since grown to quite a collection.
Among the 63 gems species are: traditional gemstones - corundum(sapphire,ruby), beryl (emerald,aquamarine), fancy diamond; and others - spinel, chrysoberyl(cat's eye,alexandrite), tanzanite, garnet(tsavorite, spessartite,), tourmaline(rubellite,indocolite), zircon, topaz, quartz(amethyst,citrine), chalcedony(agate,chrysoprase), feldspar(moonstone,labradorite), kyanite, peridot, kunsite, scapolite, flourite and many other lesser known gemstones. (view complete list on blog archive on the right with traditional gemstones at the bottom. click on types of interest to you.)
I'm now divesting my collection. An abbreviated description is provided below each photo, including price. Example 1: m2(size ref) tq(turquoise gem) ov(oval shape) plgnbl(pale greenish blue colour) afg ( Afghanistan country) 3.82 (carat weight) (18.7x8.5mm)(dimensions LxW) in mm) op (opaque clarity) 175 (USD 175 price) 10b30 N18(ref no and location). Example 2:"sa (type sapphire), ov(shape oval), dpbl(colour deep blue), af(origin Africa), 4.43(weight in carat), (11.3x10.2x4.6mm)dimension LxWxD, ec(clarity eyeclean), 1k(price US$1000)".
Personal viewing can be done for friends in Singapore.
Those outside Singapore, purchase can be secured via registered post upon payment in USD(or Singapore equivalent) via paypal, money/postal order, account transfer/cheque (Singapore) or other mutually agreed arrangement. Do have a look and contact me for any other details.
Happy viewing!
Thursday, January 14, 2010
%20400%208b23%20L49%5B3%5D.jpg "h3 sil ce ov grbk 14.28(17.7x13.3x7.1) 400 8b23 L49")
%20350%208b23%20M50%5B4%5D.jpg "l2 sil ce ov grbk 7.08(11.3x9) 350 8b23 M50")
%20350%208b23%20N56%5B2%5D.jpg "l sil ce ov gr 5.73(12.2x9.8x5.5) 350 8b23 N56")
%20300%20%208b23%20M21%5B3%5D.jpg "l sil ce ov cogbk 5.36(11.6x9.7x5.6) 300 8b23 M21")
%20250%208b23%20N20%5B4%5D.jpg "m1 sil ce ov coggr 4.83(11.9x8.8x5.4) 250 8b23 N20")
%20150%208b23%20C5%5B6%5D.jpg "m2 sil ce ovc cofbn in 3.30(8.8x7.1x5.8) 150 8b23 C5")
%20200%208b23%20M13%5B6%5D.jpg "m1 sil ce rnc dprd in 4.53(11.5x4.7) 200 8b23 M13")
sicrk%2050%208b23%20C5%5B5%5D.jpg "m1 sil ce rnc dpgn in 4.35(10x5.4)sicrk 50 8b23 C5")
cu%20500%208b23%20N68%5B5%5D.png "m1 sil ov svgy ce 4.96(11.5x9x6)cu 500 8b23 N68")
lc%20500%208b23%20T120%5B4%5D.jpg "m2 sil ov wh tt 3.82(11.9x7.7x6)lc 500 8b23 T120")
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sicrk%2050%208b23%20C5%5B2%5D.jpg){kind=link}
%20200%208b23%20M13%5B2%5D.jpg){kind=link}
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