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2. Jadeite - Wikipedia

   en.wikipedia.org/wiki/Jadeite

   Jadeite is a pyroxene mineral with composition Na Al Si 2 O 6. It is hard (Mohs hardness of about 6.5 to 7.0), very tough, and dense, with a specific gravity of about 3.4. It is found in a wide range of colors, but is most often found in shades of green or white. Jadeite is formed only in the subduction zones of continental margins, where rock ...

3. Jade - Wikipedia

   en.wikipedia.org/wiki/Jade

   Main jade producing countries. Jade is an umbrella term for two different types of decorative rocks used for jewelry or ornaments.Jade is often referred to by either of two different silicate mineral names: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminum in the pyroxene group of minerals). [1]

4. Hardstone carving - Wikipedia

   en.wikipedia.org/wiki/Hardstone_carving

   Hardstone carving, in art history and archaeology, is the artistic carving of semi-precious stones (and sometimes gemstones ), such as jade, rock crystal (clear quartz ), agate, onyx, jasper, serpentinite, or carnelian, and for objects made in this way. [ 1][ 2] Normally the objects are small, and the category overlaps with both jewellery and ...

5. List of U.S. state minerals, rocks, stones and gemstones

   en.wikipedia.org/wiki/List_of_U.S._state...

   ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue (aquamarine). ^ Florida's state gem, moonstone, was adopted to highlight Florida's role in the United States' Lunar program, which landed the first astronauts on the Moon. [81]

6. Serpentine subgroup - Wikipedia

   en.wikipedia.org/wiki/Serpentine_subgroup

   Serpentine from Poland. Serpentine subgroup (part of the kaolinite -serpentine group in the category of phyllosilicates) [1] are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos, and as decorative stone. [5]

7. Visual arts of the Indigenous peoples of the Americas

   en.wikipedia.org/wiki/Visual_arts_of_the...

   Indigenous American visual arts include portable arts, such as painting, basketry, textiles, or photography, as well as monumental works, such as architecture, land art, public sculpture, or murals. Some Indigenous art forms coincide with Western art forms; however, some, such as porcupine quillwork or birchbark biting are unique to the Americas.