Description
This is what you will learn in this downloadable pdf slides:
1. History of Heat treatment of rubies and sapphires
2. Types of heat treatment
3. Testing and observation
4. Conclusion
5. Q&A
$8.00
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1. History of Heat treatment of rubies and sapphires
2. Types of heat treatment
3. Testing and observation
4. Conclusion
5. Q&A
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