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  2. Tanzanite - Wikipedia

    en.wikipedia.org/wiki/Tanzanite

    Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate), caused by small amounts of vanadium. [3] Tanzanite belongs to the epidote mineral group.

  3. Lapis lazuli - Wikipedia

    en.wikipedia.org/wiki/Lapis_Lazuli

    Lapis lazuli (UK: / ˌ l æ p ɪ s ˈ l æ z (j) ʊ l i, ˈ l æ ʒ ʊ-,-ˌ l i /; US: / ˈ l æ z (j) ə l i, ˈ l æ ʒ ə-,-ˌ l i /), 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.

  4. Imports to Ur - Wikipedia

    en.wikipedia.org/wiki/Imports_to_Ur

    Some of the larger objects include a spouted cup, a dagger-hilt, and a whetstone. Because of its prestige and value it played a special role in cult practices and the term “lapis-like” is a commonly occurring metaphor for unusual wealth and it regularly an attribute of gods and heroes. It is commonly found associated with gold. The Standard ...

  5. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Gemstone pricing and value are governed by factors and characteristics in the quality of the stone. These characteristics include clarity, rarity, freedom from defects, the beauty of the stone, as well as the demand for such stones. There are different pricing influencers for both colored gemstones, and for diamonds.

  6. Blue pigments - Wikipedia

    en.wikipedia.org/wiki/Blue_pigments

    Persian blue: made by grinding up the mineral Lapis lazuli. The most important mineral component of lapis lazuli is lazurite (25% to 40%), a feldspathoid silicate mineral with the formula (Na,Ca) 8 (AlSiO 4) 6 (S,SO 4,Cl) 1–2. Cobalt pigments. Cobalt blue (PB28): cobalt(II) aluminate. Cerulean blue (PB35): cobalt(II) stannate. Cerium uranium ...

  7. Green pigments - Wikipedia

    en.wikipedia.org/wiki/Green_pigments

    In Latin America, the Teotihuacan civilisation, which ruled in Mexico between 300 and 650, AD, made murals using crushed malachite, which was mixed with chalk for lighter shades, or mixed with blue from azurite or lapis-lazuli to make blue greens, or with yellow ochre to make yellow-greens. [12] Classical painters made extensive use of the color.

  8. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    The name sapphire is derived from the Latin word sapphirus, itself from the Greek word sappheiros (σάπφειρος), which referred to lapis lazuli. [2] It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.

  9. Marian blue - Wikipedia

    en.wikipedia.org/wiki/Marian_blue

    A more practical explanation for the use of this color is that in Medieval and Renaissance Europe, the blue pigment was derived from the rock lapis lazuli, a stone imported from Afghanistan of greater value than gold. Beyond a painter's retainer, patrons were expected to purchase any gold or lapis lazuli to be used in the painting.

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