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2. Rubellite - Wikipedia

   en.wikipedia.org/wiki/Rubellite

   Rubellite is the red or pink variety of tourmaline and is a member of elbaite. Rubellite is also the rarest gem in its family. [2] It is occasionally mistaken for ruby. [3] These gems typically contain inclusions. [4] Notable countries where rubellite can be mined include Afghanistan, Brazil, Madagascar, Myanmar, Nigeria, Russia, and the United ...

3. Elbaite - Wikipedia

   en.wikipedia.org/wiki/Elbaite

   Elbaite, a sodium, lithium, aluminium boro-silicate, with the chemical composition Na(Li 1.5 Al 1.5)Al 6 Si 6 O 18 (BO 3) 3 (OH) 4, [4] is a mineral species belonging to the six-member ring cyclosilicate tourmaline group. Elbaite forms three series, with dravite, with fluor-liddicoatite, and with schorl.

4. Tourmaline - Wikipedia

   en.wikipedia.org/wiki/Tourmaline

   Crystals may be green at one end and pink at the other, or green on the outside and pink inside; this type is called watermelon tourmaline and is prized in jewelry. An excellent example of watermelon tourmaline jewelry is a brooch piece (1969, gold, watermelon tourmaline, diamonds) by Andrew Grima (British, b.

5. Colored gold - Wikipedia

   en.wikipedia.org/wiki/Colored_gold

   Although the names are often used interchangeably, the difference between red, rose, and pink gold is the copper content: the higher the copper content, the stronger the red coloration. Pink gold uses the least copper, followed by rose gold, with red gold having the highest copper content. Examples of the common alloys for 18K rose gold, 18K ...

6. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Paraiba Tourmaline has become one of the most popular gemstones in recent times thanks to its color and is considered to be one of the important gemstones after rubies, emeralds, and sapphires according to Gübelin Gemlab. Even though it is a tourmaline, Paraiba Tourmaline is one of the most expensive gemstones. [31]

7. Bohemian crown jewels - Wikipedia

   en.wikipedia.org/wiki/Bohemian_Crown_Jewels

   Made from 22-carat gold and a set of precious 19 sapphires, 30 emeralds, 44 spinels, 20 pearls, 1 ruby, 1 rubellite and 1 aquamarine, it weighs 2,475 g. At the top of the crown is the cross, which reportedly stores a thorn from Christ's crown of thorns. Unlike in most later crowns, the cross does not stand on a monde.