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Like amethyst, heat-treated amethyst often exhibits color zoning, or uneven color distribution throughout the crystal. In geodes and clusters, the color is usually deepest near the tips. [ 9 ] Unlike heat-treated amethyst, natural citrine typically exhibits even coloration throughout the crystal and never occurs in geodes or clusters.
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.
Clear quartz with natural iron inclusions or limonite staining may also resemble citrine, but it is not true citrine. [39] Like amethyst, heat-treated amethyst often exhibits color zoning, or uneven color distribution throughout the crystal. In geodes and clusters, the color is usually deepest near the tips. [46] This does not occur in natural ...
Citrine “A powerful gemstone crystal in a range of deep yellows, oranges, and yellow-cream-white, the citrine gemstone is said to bring abundance and wealth into one’s life,” Salzer says.
Heat can either improve or spoil gemstone color or clarity. The heating process has been well known to gem miners and cutters for centuries, and in many stone types heating is a common practice. Most citrine is made by heating amethyst, and partial heating with a strong gradient results in "ametrine" – a stone partly amethyst and partly citrine.
Citrine (protein), a type of yellow fluorescent protein; Citrine, a 2016 album by Hayley Kiyoko; Citrine (programming language), a programming language for Unix-like operating systems; Citrine, a commonly-used informal name for ABC of Chairmanship by Walter Citrine
The different oxidation states occur due to there being a temperature gradient across the crystal during its formation. However, most ametrine on the market is created by partially heating or irradiating amethyst. [4] Ametrine in the low price segment may stem from synthetic material. Green-yellow or golden-blue ametrine does not exist naturally.
Other names for green quartz are vermarine and lime citrine. Amethyst frequently shows color zoning, with the most intense color typically found at the crystal terminations. One of gem cutters' tasks is to make a finished product with even color. Sometimes, only a thin layer of a natural, uncut amethyst is violet colored, or the color is very ...
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