New Fashion Wedding 2024 Gold 18k Jewelry Diamond Ruby Necklace In Lebanon.
By Aamir Mannan. Saturday, 08, February, 2025.
These heat treatments typically occur around temperatures of 1800 °C (3300 °F). Some rubies undergo a process of low tube heat, when the stone is heated over charcoal of a temperature of about 1300 °C (2400 °F) for 20 to 30 minutes. The silk is partially broken, and the color is improved.
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