Gemstone and Jewelry
Jewelry Glossary
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Nephrite Jade
Nephrite jade had been thought to be the same mineral as jadeite since ancient times, but it turned out to be a new type in 1863. It was used as tools and weapons and as a material for sculptures.
[Moh's hardness: 6] [Mineral species: Nephrite] -
Niessing Setting
A gemstone girdle is sandwiched in a niessing setting using chased metal.
This setting method is the patent of niessing. -
North Skylight
Light coming in from a window facing north but not directly from the sun. Examining gems under the north skylight is considered the most suitable environment for appraisal.
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