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A cabochon (/ ˈ k æ b u ʃ ɒ n /; from Middle French caboche 'head') is a gemstone that has been shaped and polished, as opposed to faceted. The resulting form is usually a convex (rounded) obverse with a flat reverse. [1] Cabochon was the default method of preparing gemstones before gemstone cutting developed. [2]
Just as the angle of the sides of a cabochon creates the pressure to hold the stone in place, so there is an overlying principle in setting faceted stones. If one looks at a side view of a round diamond, for example, one will see that there is an outer edge, called the girdle, and the top angles up from there, and the bottom angles down from ...
Carbuncle (/ ˈ k ɑːr b ʌ ŋ k əl /) is another name for a deep red almandine gemstone that has been cut with a smooth, convex face in a method called cabochon. [1] Traditionally, the term referred to any red gemstone, most often a red garnet. [2] Carbuncles and their chimeras have spanned three millennia.
English: Parrot leg ring (poria-kaka), Maori people, New Zealand, 19th century, carved greenstone, ... Add a one-line explanation of what this file represents.
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A purple-pink star sapphire displaying asterism in a platinum ring. An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone. It can appear when a suitable stone is cut en cabochon (i.e. shaped and polished, not faceted).
Connections Answers for Friday, September 1, 2023: Drink Vessels, American Poets, Consecutive Double Letters, Woodwinds Related: 50 of the Best Family Board Games That'll Kick Your Game Night (Or ...
On the back of the crown is the 104-carat (20.8 g) cabochon Stuart Sapphire, and in the top cross is St Edward's Sapphire, reputedly taken from the ring of the Confessor when his body was re-interred at the Abbey in 1163. [105]
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