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  2. 4.5×26mm MKR - Wikipedia

    en.wikipedia.org/wiki/4.5×26mm_MKR

    4.63 mm, 22 mm long, cold-rolled copper, boat-tail spitzer. Neck diameter: 5.02 mm: Shoulder diameter: Shoulderless: Base diameter: 6.48 mm: Rim diameter: 7.44 mm: Case length: 26.10 mm: Overall length: 42 mm overall length: Primer type: Rimfire: Filling: 0.51 grams tubular nitrocellulose powder or 0.57 grams spherical double-base powder ...

  3. Traditional point-size names - Wikipedia

    en.wikipedia.org/wiki/Traditional_point-size_names

    (11) Diamond (4.5 pt, 1.5875 mm). Fonts originally consisted of a set of moveable type letterpunches purchased from a type foundry . As early as 1600, the sizes of these types—their "bodies" [ 1 ] —acquired traditional names in English, French, German, and Dutch, usually from their principal early uses. [ 2 ]

  4. Jewellery - Wikipedia

    en.wikipedia.org/wiki/Jewellery

    A diamond solitaire engagement ring. Now popular in engagement rings, this usage dates back to the marriage of Maximilian I to Mary of Burgundy in 1477. [17] A popular style is the diamond solitaire, which features a single large diamond mounted prominently. [18]

  5. Jewels of Diana, Princess of Wales - Wikipedia

    en.wikipedia.org/wiki/Jewels_of_Diana,_Princess...

    The central sapphire from the ring was set in the diamond sunray frame of the watch, replacing the watch face and became the centrepiece of a wide choker of midnight-blue velvet backed with Velcro. On either side of the sapphire is a chain of small diamonds, three deep, which runs halfway round the choker.

  6. Diamond - Wikipedia

    en.wikipedia.org/wiki/Diamond

    Gem-cut synthetic silicon carbide set in a ring. A diamond simulant is a non-diamond material that is used to simulate the appearance of a diamond, and may be referred to as diamante. Cubic zirconia is the most common. The gemstone moissanite (silicon carbide) can be treated as a diamond simulant, though more costly to produce than cubic ...

  7. Crystallographic defects in diamond - Wikipedia

    en.wikipedia.org/wiki/Crystallographic_defects...

    Synthetic diamonds of various colors grown by the high-pressure and high-temperature technique, the diamond size is ~2 mm. Infrared absorption spectrum of type IaB diamond. (1) region of nitrogen impurities absorption (here mostly due to the B-centers), (2) platelets peak, (3) self-absorption of diamond lattice, (4) hydrogen peaks at 3107 and ...

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