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The Ade Advanced Optics Chelsea Filter is a precision gemological tool transmitting 690nm red and 570nm yellow-green wavelengths to differentiate natural from synthetic gemstones, detect treatments, and identify dyes. Its compact, foldable design ensures portability for lab or field use, making it an essential, durable accessory for professional gemologists.





| ASIN | B008U1JBV0 |
| Batteries required | No |
| Customer Reviews | 4.5 4.5 out of 5 stars (68) |
| Date First Available | 2 December 2013 |
| Included components | Arts, Crafts and Sewing^Jewelry Making^jewelry-making-accessories |
| Is assembly required | No |
| Item model number | ChelseaBK |
| Product Dimensions | 5.08 x 5.08 x 5.08 cm; 32 g |
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