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Jewelry Books

Diamond Ring Buying Guide by Renee Newman
Consumer-oriented book filled with useful information, drawings & pictures for 1st time diamond buyer.

Photo Masters of Diamond Grading by Gary Roskin
Photo Masters is a compilation of 244 extraordinary photomicrographs, suitable for students or experienced diamond graders.

Blood Diamonds

Blood Diamonds cost torture & death for Sierra Leone residents. Conflict Diamonds finance civil wars & terrorists, including al Qaeda.

Antique Price Guide

By Judith Miller, author of more than 80 books on antiques, including "How to Make Money Out of Antiques."


What is the SI3 Grade?


The GIA Diamond clarity-scale refers to how clean, or free of imperfections a Diamond is. The GIA standard for the clarity scale consists of:

FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, ???, I1, I2, I3

So what is the SI3?

The SI3 was born out of the desire of the Diamond Industry to incorporate an extra grade to identify Diamonds in the lower range of the clarity scale. Many complained that there is too wide a gap between the SI2 and the I1 grade. Why not offer an SI3 grade to bridge the gap?

After EGL - Los Angeles (European Gemological Laboratory) started to issue the SI3 grade, even the Rapaport Diamond Report, or the Rap Sheet as it's known in the trade, added SI3 to its price list. For those who are unfamiliar with the Rap sheet, it is the definitive (but no longer only) price guide for Diamonds. It is used widely by the wholesale as well as retail industry.

Some say the SI3 is a good idea, some say it is a bad idea. We feel that it can be a good idea if implemented properly.

The problem with the SI3 today is that GIA, the largest and most widely accepted Gem Laboratory in the world, does not recognize SI3 grades.



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