Should
have clarity good shape and nice color with corresponding standard.
The final step is to set up the grouping of the
precious stones by size and color for specific orders from the
customers.
Shape
of Gems
Size
of Gems
SAPPHIRE
Group: Corundum
Hardness: 9
Specific Gravity: 4,00
Crystal System: trigonal
Index of Refraction: 1,758-1,765
Transparency: from transparent to opaque
Think
of
Blue Sapphire
Think to Expert Gems
Thanks
for visiting us at 39th Bangkok Gems & Jewelry
Fair.
See you again next time in IMPACT CHALLENGER
Customer Order
e-mail
: expertgems@yahoo.com ORDER FORM Please e-mail or fax back the form to
(66)039-321988
