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| Standard number of facets, names, and descriptions of many rhinestone, gemstone and diamond cuts and shapes as found in vintage and costume jewellery. |
| Birthstones, descriptions, healing powers, Mohs hardness scale for each birthstone. |
| Number of beads per inch, mm sizes, and aughts comparisons. |
| Rhinestone measurements in stone size (ss), pearl plate (pp) and millimeter (mm) comparisons as traditionally seen in vintage costume and rhinestone jewelry. |
| Find approximate dates for your vintage jewelry piece by the patent number on the back of the jewellery. You can find out when (dates) jewelry manufacturers were in business here. |
| The traditional measurement of gem and mineral hardness--the Mohs mineral hardness scale is depicted here from the softest minerals to diamonds. Can be of use in determining what kind of stones are in your vintage jewelry. |
| Check out these charts on the current prices for ounces of gold, silver, and platinum to find out what your vintage jewelry is worth in terms of precious metal content. Updated every 8 hours (New York City prices). |