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GIA also designs and manufactures professional equipment for grading, identifying, and selling diamonds and colored gemstones. These instruments are used to determine the physical and optical properties of gems and analyze their microscopic features. The first GIA instrument, a 10x eye loupe, was introduced in the early 1930s.
Lapidary (from the Latin lapidarius) is the practice of shaping stone, minerals, or gemstones into decorative items such as cabochons, engraved gems (including cameos), and faceted designs. A person who practices lapidary techniques of cutting, grinding, and polishing is known as a lapidary or lapidarist .
The earliest known technique of attaching stones to jewelry was bezel setting. A bezel is a strip of metal bent into the shape and size of the stone and then soldered to the piece of jewelry. The stone is then inserted into the bezel, and the metal edge of the bezel pressed over the edge of the stone, holding it in place.
Articles related to gemstones and maintained by WikiProject Gemology and Jewelry. Pages in category "WikiProject Gemology and Jewelry - Gemstones" The following 200 pages are in this category, out of approximately 374 total.
Gemstones are basically categorized based on their crystal structure, specific gravity, refractive index, and other optical properties, such as pleochroism. The physical property of "hardness" is defined by the irregular Mohs scale of mineral hardness. Gemologists study these factors while valuing or appraising cut and polished gemstones.
This page was last edited on 6 February 2025, at 11:20 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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