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2. Shades of brown - Wikipedia

   en.wikipedia.org/wiki/Shades_of_brown

   Displayed at right is the color smokey topaz. At a hue of exactly 15, it is classified as a red-brown or orange-brown. It can also be called a vermilion-brown. This color was formulated by Crayola in 1994 as one of the colors in the Gem Tones set.

3. Topaz - Wikipedia

   en.wikipedia.org/wiki/Topaz

   Topaz is a silicate mineral made of aluminum and fluorine with the chemical formula Al 2 Si O 4 (F, OH) 2.It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange. [7]

4. Smoky quartz - Wikipedia

   en.wikipedia.org/wiki/Smoky_quartz

   Smoky quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystals. [6] The color of smoky quartz is produced when natural radiation, emitted from the surrounding rock, activates color centers around aluminum impurities within the ...

5. List of colors (alphabetical) - Wikipedia

   en.wikipedia.org/wiki/List_of_colors_(alphabetical)

   This is an accepted version of this page This is the latest accepted revision, reviewed on 14 December 2024. For other color lists, see Lists of colors. This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "List of colors" alphabetical ...

6. List of Crayola crayon colors - Wikipedia

   en.wikipedia.org/wiki/List_of_Crayola_crayon_colors

   Smokey Topaz #832A0D 131 42 13 Citrine #933709 147 55 9 Tiger's Eye ... Colors for crayons other than Mixed Veggies and Star Spangled Banner come from information on ...

7. Citrine (quartz) - Wikipedia

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

   The causes of its color are not well agreed upon. Evidence suggests the color of citrine is linked to the presence of aluminum-based color centers in its crystal structure, similar to those of smoky quartz. [5] [6] Both smoky quartz and citrine are dichroic in polarized light and will fade when heated sufficiently or exposed to UV light. They ...