Note: I've weeded out the badly out of date and redundant guides so there are sometimes many more if you do a search on Amazon. I also have some regional references that are relevant. Bearce Paperback - Jul Mitchell Author.
From Wikipedia, the free encyclopedia Jump to navigation Jump to search This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. The resulting form is usually a convex rounded obverse with a flat reverse. Contents1 Application2 Gallery3 References4 External linksApplicationCutting en cabochon French: 'in the manner of a cabochon' is usually applied to opaque gems, while faceting is usually applied to transparent stones. Hardness is also taken into account as softer gemstones with a hardness lower than 7 on the Mohs hardness scale are easily scratched, mainly by silicon dioxide in dust and grit. This would quickly make translucent gems unattractive—instead they are polished as cabochons, making the scratches less evident. In the case of asteriated stones such as star sapphires and chatoyant stones such as cat's eye chrysoberyl, a domed cabochon cut is used to show the star or eye, which would not be visible in a faceted cut. The usual shape for cutting cabochons is an ellipse. This is because the eye is less sensitive to small asymmetries in an ellipse, as opposed to a uniformly round shape, such as a circle, and because the elliptical shape, combined with the dome, is attractive.
Are you looking for recommendations for a particular aspect, or are you trying to cover the whole field? There are lapidary books? I thought you just ground your fingers to nubs and then learned how not to do it. Well, my first mainstay was Gemcraft by Quick and Leiper; got my first copy as a loaner in and still use it today.
The Mojave Desert Gem and Mineral. This year we had over 50 members and guests in attendance and the. Variscite that numbered 46 plus different specimen items in rough to finished and. There was truly something for. This auction was staged for members and guests and thanks to all of you who. If we only placed unwashed,. I hope it is appreciated and will be maintained in the future or even improved. Outst and ing job. No one person.