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  2. Amethyst - Wikipedia

    en.wikipedia.org/wiki/Amethyst

    High-quality amethyst can be found in Siberia, Sri Lanka, Brazil, Uruguay, and the Far East. The ideal grade, called "Deep Siberian", has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source) red secondary hues. [7] ".

  3. Infinity Stones - Wikipedia

    en.wikipedia.org/wiki/Infinity_Stones

    They were purple for Space, yellow for Reality, red for Power, blue for Mind, orange for Time, and green for Soul. The stone colors were updated in the Marvel Legacy series to match the film versions. In the MCU, the Time Stone is housed in the Eye of Agamotto and the Space Stone is housed in the Tesseract.

  4. Lapis lazuli - Wikipedia

    en.wikipedia.org/wiki/Lapis_Lazuli

    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.

  5. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 v

  6. Tanzanite - Wikipedia

    en.wikipedia.org/wiki/Tanzanite

    As a result of this phenomenon, a multitude of colors have been observed in various specimens: shades of purple, violet, indigo, blue, cyan, green, yellow, orange, red and brown. After heating, tanzanite becomes dichroic. The dichroic colours range from violet through bluish-violet to indigo and violetish-blue to blue.

  7. Philosopher's stone - Wikipedia

    en.wikipedia.org/wiki/Philosopher's_stone

    Philosopher's stone. The Alchymist, in Search of the Philosopher's Stone by Joseph Wright of Derby, 1771. The philosopher's stone [a] is a mythic alchemical substance capable of turning base metals such as mercury into gold or silver [b]; it was also known as "the tincture" and "the powder". Alchemists additionally believed that it could be ...

  8. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    The first theme is using legendary luminous gems to illuminate buildings, for navigation lights on ships, or sometimes as guiding lights for lost persons (Ball 1938: 498–500). In India, the earliest country in which fine gemstones were known, belief in luminous gems dates back some twenty-five centuries.

  9. Ametrine - Wikipedia

    en.wikipedia.org/wiki/Ametrine

    Color: Purple, Yellow: Crystal habit: 6-sided prism ending in 6-sided pyramid (typical) Twinning: Dauphine law and Brazil law: Cleavage: none: Fracture: Conchoidal: Mohs scale hardness: 7: Lustre: Vitreous: Streak: white: Diaphaneity: Transparent to translucent: Specific gravity: 2.65: Optical properties: Unixal (+) Refractive index: n ω = 1. ...

  10. 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. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.

  11. Topaz - Wikipedia

    en.wikipedia.org/wiki/Topaz

    Topaz is often treated with heat or radiation to make it a deep blue, reddish-orange, pale green, pink, or purple. Topaz is a nesosilicate mineral, and more specifically, an aluminosilicate mineral. It is one of the hardest naturally occurring minerals and has a relatively low index of refraction.