Gem Specific Gravity

The GEM SPECIFIC GRAVITY table contains a list of the most common gems, by name and their specific gravity, which is a mean density ratio compared to the density of pure water.

Please note: this table contains a single value for the specific gravity of gems to be used in the vCalc jeweler's equations and calculator.  However, there is some variance in the accepted specific gravity to be used in jeweler's equations.  For example, the Gemological Institute published a specific gravity of 4.70 for Zircon in their tables, while The Complete Handbook for Gemstone Weight Estimation by Charles I. Carmona repeatedly sites a specific gravity of 4.00. 

If you wish to suggest different values for the specific gravity of a gem, please make a comment in this wiki.  The same action should be taken if you wish to add another gem or stone and it's specific gravity.  This table is monitored and we will respond as soon as possible.

Related to specific gravity is mean density.  vCalc provides the mean density of many common substances.