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  2. Garnet - Wikipedia

    en.wikipedia.org/wiki/Garnet

    Other varieties of color-changing garnets exist. In daylight, their color ranges from shades of green, beige, brown, gray, and blue, but in incandescent light, they appear a reddish or purplish/pink color. [25] This is the rarest type of garnet. Because of its color-changing quality, this kind of garnet resembles alexandrite. [26]

  3. Demantoid - Wikipedia

    en.wikipedia.org/wiki/Demantoid

    Demantoid is the green gemstone variety of the mineral andradite, a member of the garnet group of minerals. Andradite is a calcium- and iron-rich garnet. The chemical formula is Ca 3 Fe 2 (SiO 4) 3 with chromium substitution as the cause of the demantoid green color. Ferric iron is the cause of the yellow in the stone.

  4. Rhodolite - Wikipedia

    en.wikipedia.org/wiki/Rhodolite

    Rhodolite garnets appear as transparent red-pink-purplish gemstones, including all the different colour shades between violet and red. The colors from different rhodolite sources may vary from a lavender pink to raspberry rose or raspberry red and from purplish-violet (grape) to purplish red. [5]

  5. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Color (beta) Automatic. Light. Dark. This page is always in light mode. ... Grandite (Mali garnet) Pyrope-almandine-spessartine Malaia garnet; Pyrope-spessartine ...

  6. Doublet (lapidary) - Wikipedia

    en.wikipedia.org/wiki/Doublet_(lapidary)

    Garnet and glass doublets were first used around 1850 when it was noted that molten glass would adhere to garnet. It was a popular imitation for all types of gems in many colors because the color of the glass became the only color that could be seen. They were still being produced into the early 1900s until actual synthetic gems were introduced.

  7. Andradite - Wikipedia

    en.wikipedia.org/wiki/Andradite

    Andradite is a mineral species of the garnet group.It is a nesosilicate, with formula Ca 3 Fe 2 Si 3 O 12.. Andradite includes three varieties: Colophonite: a historical variety found in the Scandinavian islands, brownish or reddish in color, often opaque or translucent.

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