Tanzanite A+ Gem Square 4 mm (1pc) Template Ramp 300°F/ 149°C hour to

Ramp 300°F/ 149°C hour to 600°F/ 315°C and hold for 15 minutes

This Clay may be successfully fired on a ceramic fiber board or on a hard ceramic kiln shelf

I've had these since we had our store on Whyte ave called Spirit of the Rock :)

or copper (99

Tanzanite A+ Gem Square 4 mm (1pc) Template Ramp 300°F/ 149°C hour toTanzanite, 4mm square A+ fire safe gemstone. Price is for one stone. Recommended Setting: Prong (optimal) Embeddable Fireable: Firing of these stones is possible. Results may vary depending on the firing temperature with slight color changes of the stone possible. Precaution against thermal shock required.