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Tourmaline (any of a group of hard glassy minerals of ...

    http://jewellery.org.ua/stones-katalog-engl/mineral-turmalin.htm
    Any of a group of hard glassy minerals of variable colour consisting of complex borosilicates of aluminium with quantities of lithium, sodium, calcium, potassium, iron, and magnesium in hexagonal crystalline form: used in optical and electrical equipment and in jewellery.

Gemstone Hardness and Wearability - International Gem Society

    https://www.gemsociety.org/article/hardness-and-wearability/
    A 7 or higher on the Mohs scale usually indicates a gem is hard enough for normal jewelry use. This is a guideline, not a hard and fast rule. Pearls and opals are some of the most popular jewelry gems but are well below 7. Wearability can be graded as Excellent, Very Good, Good, Poor, or Display Only.

20 Types of Red Gemstones in Jewelry

    https://kamayojewelry.com/gemstone-colors/red-gemstone-names/
    Oct 14, 2013 · Rubelites are red tourmalines, which are hard glassy minerals. The red gemstones are from the species of tourmalines called elbaites, which also come in blue, green and colorless varieties. The color of rubellites ranges from red to pinkish red. The red stones are abundantly found in Brazil, Africa and Pakistan.

13 Materials Used when Making Jewellery. Metals, Stone ...

    https://www.eternaltools.com/blog/15-materials-used-for-jewellery-making
    Gold is one of the finest metals used for jewellery – traditionally the choice for wedding bands. Gold is one of the most malleable (easily squashed) and ductile (easily stretched) metals, making it easy to work with. Gold is resistant to most acids.

11 Common Metals That are Used in Jewelry Making ...

    https://fashionhance.com/common-metals-used-in-jewelry-making
    Tungsten carbide, a compound of tungsten and carbon, is used to make jewelry. It is a very hard metal and can be scratched only by diamond. An advantage of tungsten jewelry is that it is hypoallergenic. But, there are limited jewelry options in tungsten, restricting its popularity.

Precious minerals that are used in jewelery Codycross ...

    https://www.gameanswer.net/precious-minerals-that-are-used-in-jewelery-codycross/
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