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<p>[QUOTE=&quot;Bronwen, post: 2031737, member: 5833&quot;]So glass is the softest material it measures.&nbsp; You could not successfully test something like alabaster.&nbsp; I have no idea why glass does not always register.&nbsp; Perhaps evelyb has the right answer, that it depends on shape.</p><p><br /></p><p>I do not understand why chrysoprase, which I should have added under jasper, would come out with a different reading than the other quartzes.&nbsp; Cornelian isn&#039;t there at all, even though it is probably one of the most common semi-precious stones used in jewellery.&nbsp; Would it test in the quartz range or the chrysoprase range?&nbsp; Why would aquamarine test differently than emerald?&nbsp; Where is zircon?&nbsp; (And cubic zirconia?)&nbsp; And what the heck is CAL, way up there near the border with diamond?&nbsp; I definitely wouldn&#039;t rely on this contraption for the definitive identification of anything, although perhaps it is useful in suggesting directions for research.[/QUOTE]</p><p><br /></p>

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