How best to mount micro pave in amberI have a requested design which, in part, will involve using 0.9-2.25mm rubies set in amber (in a calligraphic initial). I had briefly considered heat but the amber in which they are to be set is w...
Introduction and Help with Refractometer...e rocks of which our gravel roads around here are made, and those which are the base in most of our paved roads, would have rocks bought in on containers from other places via train and containers deliver...
Correct way to get Specific Gravity....001 gram or 0.005 carat precision, it should be able to measure SG for most stone sizes except for pave` or melee. Most portable "pocket" sized scales are less accurate typically down to 0.02 g. Which ma...
Measuring birefringence when R.I. is OTL...er… I have a collection of roses that are invaluable, collected when I was a kid… the site has been paved over for decades by a subdivision. Otherwise nothing of gem or specimen interest in Hawaii…the geo...
