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2. Body jewelry sizes - Wikipedia

   en.wikipedia.org/wiki/Body_jewelry_sizes

   A gauge number denotes a thickness on a standardized scale which, for most purposes, starts at 20g (0.812 mm thick— often used for the posts for nose studs), and increases in thickness (as the gauge number decreases) to 0g, then 00g, and rarely goes any further as these thicknesses come closer and closer to 1 ⁄ 2 ″.

3. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   A diamond with facets cut only a few degrees out of alignment can result in a poorly performing stone. For a round brilliant cut, there is a balance between "brilliance" and "fire". When a diamond is cut for too much "fire", it looks like a cubic zirconia, which gives off much more "fire" than real diamond. A well-executed round brilliant cut ...

4. List of largest rough diamonds - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_rough_diamonds

   This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.

5. Ring size - Wikipedia

   en.wikipedia.org/wiki/Ring_size

   An analogic sizing ring stick. Ring sizes can be measured physically by a paper, plastic, or metal ring sizer (as a gauge) or by measuring the inner diameter of a ring that already fits. Ring sticks are tools used to measure the inner size of a ring, and are typically made from plastic, delrin, wood, aluminium, or of multiple materials. Digital ...

6. Diamond cut - Wikipedia

   en.wikipedia.org/wiki/Diamond_cut

   A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut. Cut refers to shape (pear, oval), and also the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance—a poorly-cut diamond is less luminous.

7. Diamonds as an investment - Wikipedia

   en.wikipedia.org/wiki/Diamonds_as_an_investment

   Since the 1950s, techniques can produce gem-quality diamonds of essentially any desired chemistry in sizes up to about 1cm. [6] Although some manufacturers do label their synthetic diamonds with serial numbers, there is no guarantee that a given diamond is not man made, although sometimes an unnatural chemical composition or pattern of flaws may suggest a diamond is synthetic.