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| First Page | Document Content | |
|---|---|---|
 Date: 2012-12-27 05:09:44Superhard materials Matter Oxide minerals Transparent materials Abrasives CIBJO Jewellery Blue book Pearl Gemstones Chemistry Manufacturing |
| First Page | Document Content | |
|---|---|---|
Date: 2012-12-27 05:09:44Superhard materials Matter Oxide minerals Transparent materials Abrasives CIBJO Jewellery Blue book Pearl Gemstones Chemistry Manufacturing |
