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The ornamental design for a gemstone, as shown and described.
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| Patent | Priority | Assignee | Title |
| ER9086, |
| Patent | Priority | Assignee | Title |
| 6990833, | Sep 23 2002 | ROBBINS BROS JEWELRY, INC ; WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT | Faceted circular cut diamond |
| 8844319, | Jan 14 2011 | Cut gemstone providing a specific optical pattern | |
| 20050252241, | |||
| 20070186586, | |||
| D412136, | Jun 18 1998 | STERLING JEWELERS INC | Gem stone |
| D437671, | Dec 29 1998 | WORLD KITCHEN, LLC | Diamond-shaped candy |
| D455367, | May 04 2000 | Precious stone | |
| D459268, | May 15 2001 | William Goldberg Diamond Corp. | Jewelry stone |
| D459677, | Oct 26 2001 | WORLDWIDE DIAMOND TRADEMARKS LTD | Diamond |
| D498170, | Jun 19 2000 | Rosy Blue N.V., A Corp. of Belgium | Marquise cut precious stone design |
| D499984, | Nov 12 2003 | Oval faceted gemstone crown | |
| D501153, | May 19 2003 | SUBERI BROTHERS LLC | Precious stone |
| D694665, | Feb 23 2013 | Diamond | |
| D810613, | Mar 31 2017 | ROSY BLUE INDIA PVT LTD | Multiple facet gemstone |
| D878961, | May 28 2018 | WORLDWIDE DIAMOND TRADEMARKS, LTD | Diamond |
| D885244, | May 14 2018 | P. D. MEHTA EXPORT LLP | Marquise cut precious stone |
| D893342, | May 28 2018 | WORLDWIDE DIAMOND TRADEMARKS, LTD | Diamond |
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