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My Shimmering ExperanzaMA155
Total Diamonds = 0,.70 crt
White Gold = 2.2 gr
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Twinkle-twinkle Little Stars
MA145Total Diamonds = 0.40 crtWhite Gold = 1.8 gr======================================================
Diamond, composed of carbon, is the hardest natural substance in the world. Each carbon atom is surrounded by four neighboring carbon atoms in a tetrahedral coordination that is the result of a covalent bond and a face-centered arrangement in the cubic unit cell. It is in the isometric crystal system, which is reflected in the commonly found octahedral or cubic crystal form.
Diamond has perfect four directional cleavage, adamant luster, and both a high refractive index, and specific gravity. Color is usually pale yellow to colorless, but can also be brown, blue, green, orange, red, and black. It is also known as the hardest natural material, where hardness is defined as resistance to scratching. Diamond's hardness has been known since antiquity, and is the source of its name.
Natural diamonds, are classified by the type and level of impurities found within them.- Type Ia diamond - Most natural diamonds are of this type, which contain up to 0.3% nitrogen.
- Type Ib diamond - Very rare (~0.1%) in nature, but almost all synthetic (industrial) diamonds are of this type. They contain nitrogen at concentrations of up to 500 ppm.
- Type IIa diamond - Very rare in nature, these diamonds contain so little nitrogen that it can't be easily detected by the usual IR or UV absorption measurements.
- Type IIb diamond - Extremely rare in nature. These have such a low concentration of nitrogen (even lower than type IIa) that the crystal is a p-type semiconductor (due to uncompensated B acceptor impurities).
Diamonds are rare
As there are so many diamonds available in jewelry stores, it is hard to think that diamonds are actually a rare item. It is a great deal and long way of work involved in turning a diamond to the condition that could be sold in store.Over one million diamonds that are mined, it's only one quality one carat diamond can be found, as that rate it would take five million diamonds to find one two carat diamond. It is even possible that those that are found are only industrial quality. These are the diamonds that are used on drill bits. Hence, one carat diamonds are so much worth because of the work to bring them to the jeweler's case, as they are a one in a million item.
My Shimmering Experanza
