國立故宮博物院、巴黎裝飾藝術博物館和梵克雅寶「大美不言」典藏精粹特展，於奇巧間探索東西方工藝的多重玄
The poesy ring was a kind of ring which was common during the Renaissance era. It absolutely was a band of sterling silver inscribed using a poem or "poesy".[3]
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Diamond unit mobile, showing the tetrahedral structure The most typical crystal framework of diamond is called diamond cubic. It is fashioned of unit cells (see the determine) stacked collectively. Whilst you will discover eighteen atoms while in the determine, Every corner atom is shared by eight unit cells and every atom in the center of a experience is shared by two, so there are a total of eight atoms per device mobile.[eighteen] The size of all sides of your device mobile is denoted by a which is three.567 angstroms.[19]
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Carat pounds: A larger carat pounds may be extraordinary, but a more compact, very well-cut diamond can seem just as spectacular, so don’t have a specific size stuck with your head. It’s the general look you’re going for.
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Coatings are increasingly utilized to provide a diamond simulant for example cubic zirconia a far more "diamond-like" visual appearance. 1 these types of compound is diamond-like carbon—an amorphous carbonaceous product which includes some Actual physical properties similar to All those with the diamond.
As with all content, the macroscopic geometry of a diamond contributes to its resistance to breakage. Diamond contains a cleavage plane and it is consequently extra fragile in a few orientations than Many others. Diamond cutters use this attribute to cleave some stones just before faceting them.[36] "Impression toughness" is among the major indexes to evaluate the quality of artificial industrial diamonds.
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[fourteen] It's a relic of the times when relationship was a agreement amongst family members, not specific enthusiasts. The two households were then eager to make sure the economic security from the youthful couple. Occasionally it went in terms of staying a conditional exchange as this old (and today out-of-date) German 求婚戒指 formulation shows: "I Provide you this ring as an indication of the marriage that has been promised involving us, offered your father gives along with you a relationship portion of a thousand Reichsthalers" (somewhere around 20 kg (44 lb) of silver).[fourteen]
Artificial diamonds are diamonds produced inside a laboratory, as opposed to diamonds mined with the Earth. The gemological and industrial employs of diamond have designed a sizable demand for tough stones. This need has been contented largely by synthetic diamonds, which have been created by a variety of processes for in excess of fifty percent a century.
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The boundary among gem-good quality diamonds and industrial diamonds is inadequately outlined and partly is dependent upon current market disorders (for example, if demand for polished diamonds is substantial, some lower-grade stones will likely be polished into very low-high-quality or modest gemstones rather than becoming offered for industrial use).