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Natural Yellow Sapphire Cabochons

September birthstone, these cabochon Sapphires are high quality, well cut. Great for jewelry design. These genuine gemstones will help you create beautiful finished cabochon jewelry.  Beliefs, sapphires protect loved ones from envy and harm.  Sapphire representing  sincerity and faithfulness.

Hardness: 9
Refractive index: 1.76
Specific Gravity: 4.0
Dispersion: .018 medium
Heat Sensitivity: None
Treatment: Heat Treated
Care: Wash with warm, soapy water. Ultrasonic and steam cleaning are usually safe.

Metal Clay, safe to fire.
Test Results, Silver 1200F-1HR, Silver 1475F-1HR, Bronze 1525F-2HR, Copper 1778F-30min.  Safe to use torch and safe to use carbon.