From The Gemology Project
Blueflashglassfilledruby.jpg (638 × 565 pixels, file size: 107 KB, MIME type: image/jpeg)
Blue flashes in a glass filled ruby, diagnostic for lead-glass filing.
© Tim Spauwen
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|current||01:52, 10 March 2010||638 × 565 (107 KB)||Tim||(Blue flashes in a glass filled ruby, diagnostic for lead-glass filing. <br /> © Tim Spauwen)|