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Scriber / scratch-test for diamonds

Scriber / scratch-test for diamonds

Quicktest

£9

Summary Scriber, 150mm long, carbide tip. Detail For testing 'rough' (uncut) diamonds -a good simple method, because most (not all) gemstones can be scratched with a carbide tip whereas diamond cannot. For testing CUT diamonds: draw the tip across customer's precious gemstone, if it scratches it, it's not diamond (then the customer sues you for damaging their precious gemstone). Remarkably, customers do buy these as a 'cheap' method of testing cut diamonds, they say, "It's OK, I'll be careful!". Is it easy to use? Yes. Limitations Stones (including diamonds) are not necessarily the same hardne

Quicktest's own words, read from their page.

Buy from QUICKTEST LIMITEDQUICKTEST LIMITED is a UK retailer, not the maker. Price seen 2026-09-26. Not an affiliate link, we earn nothing from it.

Where this comes from

The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.