Citrine: Mineral information, data and localities. - mindat.org
WEBCitrine can be found in the same geological environments as smoky quartz and is often associated and intergrown with it. Contrary to amethyst, citrine crystals may show a macromosaic structure and become very large (meter-size crystals of good quality have been found Minas Gerais, Brazil).
Quartz: Mineral information, data and localities. - mindat.org
WEBFormula: SiO2. Colour: Colorless, purple, rose, red, black, yellow, brown, green, blue, orange, etc. Lustre: Vitreous. Hardness: 7. Specific Gravity: 2.65 - 2.66. Crystal System: Trigonal. Name: Quartz has been known and appreciated since pre-historic times.
Oco geode deposits (Ocho), - mindat.org
WEBDeposits of dark red-brown soils in the Tres Pinheiros region, which produce the Oco or Ocho geodes.
Citrine: The quartz mineral Citrine information and pictures
WEBCitrine is the yellow to brownish-red variety of the mineral Quartz. It is a widely used as a gemstone, and after Amethyst it is the most popular Quartz gem. Most Citrine is formed by heat treating purple Amethyst. Citrine may also be produced by heat-treating Smoky Quartz from certain localities.
Quartz | Common Minerals
WEBThe most common chert color varieties are flint (dark gray to black), jasper (red to red-brown), and onyx (mixed white and black). Agate is another variety of chert that exhibits distinct bands of color that formed as the chemistry of the fluids moving through its host rock changed slightly.
Citrine: The yellow to orange birthstone of November - Geology.com
WEBWhat Is Citrine? Citrine is a transparent variety of quartz with a yellow to orange color. Its attractive color, high clarity, low price, and durability make it the most frequently purchased yellow to orange gem. Citrine is also a modern birthstone for the month of November.
General : Rare citrine? - mindat.org
WEBSep 20, 2020 · Indeed, Mindat's definition for Citrine is - "Yellow to Yellow-orange or yellow-green variety of quartz. Quartz coloured by inclusions or coatings of any kind is not called citrine". And Zack, if you look at Mindat's photos of citrine, you will see other examples of citrine having a similar colour to yours.
Quartz: Types and Varieties of Quartz (Photos) – Geology In
WEBCitrine is a beautiful yellow or orange variety of quartz that is prized for its sunny colors and symbolism of abundance, prosperity, and optimism. Citrine's color ranges from pale yellow to brownish orange, with deeper saturated tones being more valuable. It's a popular choice for jewelry due to its affordability and vibrant color.
Quartz | Mineralogy4Kids
WEBIt is found in an impressive range of varieties and colors; the purple variety is amethyst, which gets its color from small amounts of ferric iron; the yellow variety is called citrine; while the dark variety, smoky quartz, is formed from exposure to radioactive material.
Citrine gemstone information - gemdat.org
WEBCitrine gemstone information. The name Citrine is derived from its lemon yellow colour. Citrine is sometimes very pale or almost colourless. Among deeper coloured stones may be seen wine-yellow, honey-yellow, and saffron-yellow specimens, while others have quite a pronounced brown tinge.
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