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Rubies from Winza, Tanzania > putting the gem back in gemology |
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Synthetic Red Spinel > putting the gem back in gemology |
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JewelFolio™ > putting the gem back in gemology |
| Mellow melo > an imitation melo pearl |
Bad blues |
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Not easy being green > a look at treated green amber |
Dangerous curves |
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True blue > tanzanite grading from the AGTA GTC |
A visit to Madagascar |
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Tourmaline |
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Gemological travel > hunting the mother lode abroad |
The Be blues |
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