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SILLIMANITE GEMSTONES

Sillimanite, Al2SiO5, Aluminum Silicate, is a polymorph with two other minerals, kyanite and andalusite.  A polymorph is a mineral that shares the same chemistry but a different crystal structure with another, or other, minerals. Sillimanites crystal system is orthorhombic. Sillimanite is a rare gemstone that is not frequently seen in faceted form.  The crystals are found in shades of brown, white and green.  Generally, only the rare, prismatic transparent crystals are cut as gemstones.  The refractive index is 1.654-1.683.  Sillimanite gemstones have a hardness of 7.5 on the mohs scale, making Sillimanite gemstones very wearable in jewelry. We have the following loose faceted sillimanite gemstones in stock.

Click on any image to enlarge.
ITEM # SIZE SHAPE COLOR & GRADE WEIGHT PRICE PER CARAT ITEM PRICE


OVAL



709 sillimanite
8.5x7.0mm
Oval
Clear AA
1.78 cts.
$32.00
$56.96
715 sillimanite
8.7x7.4mm
Oval
Clear AAA
2.15 cts.
$38.00
$81.70
708 sillimanite
8.8x7.2mm
Oval
Clear A+
1.70 cts.
$20.00
$34.00
717 sillimanite
8.8x7.4mm
Oval
ClearAAA
1.70 cts/
$38.00
$64.60
701 sillimanite
9x7.3mm
Oval
Clear AA
1.65 cts.
$32.00
$52.80
713 sillimanite
9.5x7.7mm
Oval
Clear AAA
1.95 cts.
$38.00
$74.10
718 sillimanite
10.3x8.1mm
Oval
ClearB+
1.90 cts.
$12.00
$22.80
712 sillimanite
10.4x8.3mm
Oval
Clear AAA
2.40 cts.
$38.00
$91.20 
711 sillimanite
10.5x8.5mm
Oval
Clear AA
2.85 cts.
$32.00
$91.20
704 sillimanite
10.6x8.5mm
Oval
Clear A
2.50 cts.
$18.00
$45.00
714 sillimanite
11x8.5mm
Oval
Clear AA
3.00 cts.
$32.00
$96.00
710 sillimanite
11x9mm
Oval
Clear A-
3.05 cts.
$16.00
$48.80
716 sillimanite
11.3x9mm
Oval
Clear A+
3.20 cts.
$20.00
$64.00
706 sillimanite
13.4x10.9mm
Oval
Clear AAA
4.80 cts.
$38.00
$182.40


EMERALD CUT



707 sillimanite
8.7x6.8mm
Emerald Cut
Clear AAA
2.20 cts.
$38.00
$83.60
702 sillimanite
11x7mm
Emerald Cut
Clear A+
1.80 cts.
20.00
$36.00
705 sillimanite   
12.8x9.8mm
Emerald Cut
Clear A+
6.00 cts.
$20.00
$120.00

For more information, e-mail us at sales@thebrazilianconnection.com
or call us: (April 1 - September 30)  570-925-2121
(October 1 - March 30)  828-837-6860
cell phone - 828-360-2850