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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison. As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium.

  3. Anredera cordifolia - Wikipedia

    en.wikipedia.org/wiki/Anredera_cordifolia

    Anredera cordifolia, commonly known as the Madeira vine [1] or mignonette vine, [2] is a South American species of ornamental succulent vine of the family Basellaceae ...

  4. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Citrine: Yellow quartz ranging to reddish-orange or brown (Madeira citrine), and occasionally greenish yellow: Transparent Macrocrystalline Rose quartz: Pink, may display diasterism: Transparent Macrocrystalline Chalcedony: Fibrous, occurs in many varieties. The term is often used for white, cloudy, or lightly colored material intergrown with ...

  5. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Actinolite. Nephrite (var.); Adamite; Aegirine; Afghanite; Agrellite; Algodonite; Alunite; Amblygonite; Analcime; Anatase; Andalusite. Chiastolite; Andesine ...

  6. Citrine (colour) - Wikipedia

    en.wikipedia.org/wiki/Citrine_(colour)

    Citrine / ˈ s ɪ t r iː n / is a colour, the most common reference for which is certain coloured varieties of quartz which are a medium deep shade of golden yellow. Citrine has been summarized at various times as yellow, greenish-yellow, brownish yellow or orange. [2] The original reference point for the citrine colour was the citron fruit.

  7. Carat (mass) - Wikipedia

    en.wikipedia.org/wiki/Carat_(mass)

    The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat , was adopted in 1907 at the Fourth General Conference on Weights and Measures , [ 1 ] [ 2 ] and soon afterwards in many countries around the world.