Diamond Stock Exchange
Singapore Jewellers Association
National Jeweler
American Gem Society
Jewelers of America
Jewellery Distributors' Association -United Kingdom
International Colored Gemstone Association
Birthstone Chart
Diamonds
Diamonds Are Forever
Jewellery Web
Jewelry Making And Gemmology School
Table Discription of Brilliant Cut
Diamonds of the Web
Gemology course
Gemstone
Grading Systems
How to buy a Diamond
Chart of gem stone grading parameters
American Society of Appraisers
Canada Institute of Gemology
Canadian Jeweler
National Jeweler
Brilliant Software
Easy Jewelry Software
GaltWare
GemData
Tiqsons Software
Kimberly Diamond Corp
Sierra Leone