These are gems that I have chosen to be suitable for Precious Metal Clay casting.  Most are AAA cubic zirconia as I think they are the best value, but for some colours cz is not stable, for those colours I have picked different types of gemstones, mainly nano crystal.  Here is the colour list and the gemstone used, all gemstones are lab created:

When you buy 1 of each, you will get one of each of the following gems in the chosen size, grey is only available in 2mm for now.

Please check the melting points for each colour, nano sital will not work with temperatures over 1700 degrees 

White - 3A Quality CZ  -  Melting point:  2750 C (4976 F)
Yellow - 3A Quality CZ  -  Melting point:  2750 C (4976 F)
Emerald Green - Nano Crystal  -  Melting point:  1700 C (3092 F) 
Paraiba Blue - Nano Crystal  -  Melting point:  1700 C (3092 F) - only available in 3mm
Red - 3A Quality CZ  -  Melting point:  2750 C (4976 F)
Dark Pink Ruby - Lab Created Ruby - Melting point 2040 C (3704 F)
Amethyst - 3A Quality CZ  -  Melting point:  2750 C (4976 F)
Orange - 6A Quality CZ  -  Melting point:  2750 C (4976 F)
Pink - 3A Quality CZ  -  Melting point:  2750 C (4976 F)
Blue Sapphire - Nano Crystal  -  Melting point:  1700 C (3092 F)
Black - Nano Crystal  -  Melting point:  1700 C (3092 F) 
Champagne - 6A Quality CZ  -  Melting point:  2750 C (4976 F) 
Light Champagne - 6A Quality CZ  -  Melting point:  2750 C (4976 F)
Canary Yellow - 3A Quality CZ  -  Melting point:  2750 C (4976 F)
Blue Topaz - Nano Crystal  -  Melting point:  1700 C (3092 F) 
Turquoise - Nano Crystal  -  Melting point:  1700 C (3092 F) 
Aquamarine - Nano Crystal  -  Melting point:  1700 C (3092 F) 
Gray - Nano Crystal  -  Melting point:  1700 C (3092 F) 
 

The cz in this listing is AAA when possible, I sell higher quality cz than AAA in my other listings.  I am still working on this listing and more sizes and colours will be added soon.

Nano Crystal (nanosital) is the latest technology in synthetic gemstones, made especially for precious metal clay to withstand heat and not change colour.  Any gemstone colour can be matched.

This is for precious metal clay stones fired in a kiln, the stones are guaranteed not to shatter or change colour when fired in a kiln at a temperature less than the melting point temperatures shown above.