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2. Egyptian faience - Wikipedia

   en.wikipedia.org/wiki/Egyptian_faience

   Egyptian faience is a non-clay based ceramic composed of crushed quartz or sand, with small amounts of calcite lime and a mixture of alkalis, displaying surface vitrification due to the soda lime silica glaze often containing copper pigments to create a bright blue-green luster. [7]

3. Magatama - Wikipedia

   en.wikipedia.org/wiki/Magatama

   Magatama were commonly used to create necklaces and bracelets worn on the wrists or ankles. The necklace was typically constructed of jadeite magatama separated by cylindrical bored-holed pieces of jasper. Small beads of dark-blue glass are also not uncommon on the necklace.

4. Chrysocolla - Wikipedia

   en.wikipedia.org/wiki/Chrysocolla

   Generally, dark navy blue chrysocolla is too soft to be used in jewelry, while cyan, green, and blue-green chrysocolla can have a hardness approaching 6, similar to turquoise. Chrysocolla chalcedony is a heavily silicified form of chrysocolla that forms in quartz deposits and can be very hard and approach a hardness of 7. [9] [10] [11]

5. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Virtually all blue topaz, both the lighter and the darker blue shades such as "London" blue, has been irradiated to change the color from white to blue. Most green quartz (Oro Verde) are also irradiated to achieve the yellow-green color. Diamonds are mainly irradiated to become blue-green or green, although other colors are possible.

6. Bali-og - Wikipedia

   en.wikipedia.org/wiki/Bali-og

   Among the various Lumad peoples of Mindanao, particularly the inter-related Manobo groups, bali-og are bead necklaces composed chokers and necklaces fastened around the neck. A fringe of more beads and other ornaments (including copper or brass bells, amulets, and shells) are then attached to the lower edge of the chokers.

7. Turquoise - Wikipedia

   en.wikipedia.org/wiki/Turquoise

   Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 8 ·4H 2 O.It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.