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and diamond experts who need high-precision
colour filters
Durable construction for long-lasting performance
the authors explain how to properly use essential but uncomplicated instruments to identify stones
A convenient way for quick estimates of carat weight without the need to remove stones from their settings
Center Punch Starrett - USA Scales and diamond experts who needMark all metals without using a hammer. This compact tool delivers pin point impressions with a simple depression of the hand. The impression depth may be varied by adjusting the knurled screw head. Features Rugged automatic punches with all steel handles and parts Internal mechanism automatically strikes a blow when downward pressure is applied Spring tension, which regulates the blow, is constant so marks made by the point are uniform in depth and