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Diamond is a well-known allotrope of carbon. The hardness, extremely high refractive index, and high dispersion of light make diamond useful for industrial applications and for jewelry. Diamond is the hardest known natural mineral. This makes it an excellent abrasive and makes it hold polish and luster extremely well.
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u+25c8 white diamond containing black small diamond A lozenge ( / ˈ l ɒ z ɪ n dʒ / [ 1 ] LOZ -inj ; symbol: ), often referred to as a diamond , is a form of rhombus . The definition of lozenge is not strictly fixed, and the word is sometimes used simply as a synonym (from Old French losenge ) for rhombus .
A necklace is an article of jewellery that is worn around the neck. Necklaces may have been one of the earliest types of adornment worn by humans. [ 1 ] They often serve ceremonial , religious , magical , or funerary purposes and are also used as symbols of wealth and status, given that they are commonly made of precious metals and stones.