Geologic provinces of the planet. The pink and orange regions are shields and platforms, which collectively constitute cratons. Diamonds are much from evenly distributed over the Earth. A general guideline known as Clifford's rule states that they're nearly always located in kimberlites over the oldest Element of cratons, the stable cores of continents with standard ages of 2.five billion yrs or even more.[68][seventy three]: 314 Having said that, you will discover exceptions. The Argyle diamond mine in Australia, the most important producer of diamonds by fat on this planet, is located inside of a cell belt, generally known as an orogenic belt,[seventy four] a weaker zone encompassing the central craton which has gone through compressional tectonics.
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A pair of wedding rings A wedding ring or wedding band is actually a finger ring that indicates that its wearer is married.[one] It is generally solid from metallic, ordinarily gold or An additional precious steel. Rings have been Utilized in historical Rome during marriage.[2]
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Diagram of a volcanic pipe Geological evidence supports a model wherein kimberlite magma rises at 4–20 meters for each second, developing an upward route by hydraulic fracturing on the rock. Since the stress decreases, a vapor phase exsolves within the magma, and this helps you to preserve the magma fluid.
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鑲嵌精緻小鑽，為戒指增添一抹華麗感。男女戒指的鑽石數量和設計細節可做出變化，無論日常佩戴或正式場合都能展現品味。
碳有數種已知的同素異形體：不定形碳 ，碳奈米泡沫 ，金剛石，藍絲黛爾石 ，蠟石 ，聚合鑽石奈米棒 ，環碳石墨烯、石墨和富勒烯。在熱力學上，金剛石的穩定性低於石墨，可自發轉變為石墨，但常溫常壓下這一轉變的速度很慢，可以忽略不計，因此鑽石得以穩定存在。自然界形成的金剛石一般形成於地球內部高溫高壓的環境，後來被火山噴發等地殼構造運動帶到地表，因此許多金剛石發現在火山附近。現代工業可在高溫高壓下生產金剛石，稱為「合成金剛石」。
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訂婚戒指方方面面都揭露了求婚者和被求婚者的許多信息。你是怎麼樣的男性，就該選擇什麼風格的戒指，或者，那個特色風格的戒指，就會找上你。