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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( OH)8·4 H 2 O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 ( P O 4) 4 (O H) 8· 4 H 2 O. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue. A turquoise dome of the Po-i-Kalyan Mosque in ...
Howlite is commonly used to make decorative objects such as small carvings or jewelry components. Because of its porous texture, howlite can be easily dyed to imitate other minerals, especially turquoise because of the superficial similarity of the veining patterns. Howlite is also sold in its natural state, sometimes under the trade names of ...
Its coloration varies from bluish white, light-blue, light-green, green-blue, turquoise blue, turquoise green, turquoise blue-green, deep green, dark green, to deep blue, dark blue and purple, violet and indigo and the larimar can come in many varieties and color mixes.
Firoozeh Koobi (Persian: فیروزه کوبی; Firouze Koobi, or Firuzehkubi) is an Iranian handicraft made of a copper vessel that is covered with inlayed turquoise stone. [1] It is one of the most popular souvenirs of Isfahan. [2] Although the technique has a short history (less than 100 years), due to the use of precious stones and the ...
Lapis lazuli ( UK: / ˌlæpɪs ˈlæz ( j) ʊli, ˈlæʒʊ -, - ˌli /; US: / ˈlæz ( j) əli, ˈlæʒə -, - ˌli / ), or lapis for short, is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color.
Turquoise is closely associated with Navajo jewelry, but it was not until 1880 that the first turquoise was known to be set in silver. Turquoise became much more readily available in ensuing decades. Coral and other semi-precious stones came into common use around 1900.
Stones which are opaque or semi-opaque such as opal, turquoise, variscite, etc. are commonly cut as cabochons. These gems are designed to show the stone's color, luster and other surface properties as opposed to internal reflection properties like brilliance.
Variscite is a hydrated aluminium phosphate mineral ( AlPO4·2H2O ). It is a relatively rare phosphate mineral. It is sometimes confused with turquoise; however, variscite is usually greener in color. The green color results from the presence of small amounts of trivalent chromium ( Cr3+. ).
The Double-headed serpent is an Aztec sculpture. It is a snake with two heads composed of mostly turquoise pieces applied to a wooden base. It came from Aztec Mexico and might have been worn or displayed in religious ceremonies. [1] The mosaic is made of pieces of turquoise, spiny oyster shell and conch shell. [2]