5 Essential Elements For 介指
5 Essential Elements For 介指
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鋸 · 磨 · 焊 · 鍛 · 拋 · 鑲 · 鍍 · 失蠟法 · 鑄造 · 浸滲 · 氧化 · 雕版
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The double-ring ceremony describes the exchange of wedding rings by and for equally spouses. In several European nations including the Nordic nations, it is common to exchange basic engagement rings of a similar sort for each sexes, and generally, yet another, much more treasured, and bejeweled wedding ring is supplied to the bride. Inside the nuptials, the groom's ring will become a wedding ring also, and will be bestowed anew from the bride like a Section of the wedding ceremony. The engagement is usually a make any difference of agreement among The 2, as well as wedding rings are chosen collectively. Both of those engagement and wedding rings are worn on the left hand in Sweden and Finland, the bride getting the two rings collectively. Often, the groom gets a independent wedding ring. In Germany and Austria, each functions use engagement rings worn about the left hand.[6] With the nuptials, a wedding ring is placed on the right hand, as in various east European nations, which include Bulgaria, Poland, and Russia.
以鑽石、貴金屬這樣堅固且不受時空侵擾的物質所製成的對戒，更是代表了歷久彌新且堅若磐石的情感。
The generation and distribution of diamonds is essentially consolidated during the hands of a few crucial gamers, and concentrated in regular diamond trading facilities, A very powerful becoming Antwerp, wherever eighty% of all rough 鑽戒 diamonds, fifty% of all Lower diamonds and a lot more than fifty% of all rough, Lower and industrial diamonds blended are managed.
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The De Beers firm, as the earth's most significant diamond mining enterprise, retains a dominant posture within the market, and has completed so considering that shortly immediately after its founding in 1888 because of the British businessman Cecil Rhodes. De Beers is at this time the whole world's major operator of diamond manufacturing facilities (mines) and distribution channels for gem-excellent diamonds. The Diamond Investing Enterprise (DTC) is a subsidiary of De Beers and marketplaces tough diamonds from De Beers-operated mines. De Beers and its subsidiaries have mines that deliver some forty% of once-a-year earth diamond output.
As with any material, the macroscopic geometry of a diamond contributes to its resistance to breakage. Diamond has a cleavage airplane and is particularly hence more fragile in some orientations than Other people. Diamond cutters use this attribute to cleave some stones just before faceting them.[36] "Effect toughness" is probably the key indexes to evaluate the caliber of synthetic industrial diamonds.
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Other specialised purposes also exist or are being produced, such as use as semiconductors: some blue diamonds are normal semiconductors, in distinction to most diamonds, which can be exceptional electrical insulators.
A spherical outstanding Minimize diamond set in a very ring Essentially the most common employs of diamonds today are as gemstones employed for adornment, and as industrial abrasives for cutting tough materials. The marketplaces for gem-quality and industrial-grade diamonds worth diamonds in another way.
Quite possibly the most time-consuming Portion of the chopping will be the preliminary Assessment on the tough stone. It wants to deal with a large number of troubles, bears A great deal duty, and for that reason can past yrs in case of exclusive diamonds. The following issues are considered:
鑽石產區圖 傳統釐定鑽石價值高低的標準是「4C」制度，即克拉、色澤、淨度、和切割。