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  2. Inclusion (mineral) - Wikipedia

    en.wikipedia.org/wiki/Inclusion_(mineral)

    Inclusions are one of the most important factors when it comes to gem valuation. They diminish the clarity and value of many gemstones, such as diamonds, and increase the value of others, such as star sapphires. [5] Many colored gemstones are expected to have inclusions which do not greatly affect their values. They are categorized into three ...

  3. Alkali feldspar granite - Wikipedia

    en.wikipedia.org/wiki/Alkali_feldspar_granite

    Alkali feldspar granite, some varieties of which are called 'red granite', [1] is a felsic igneous rock and a type of granite rich in the mineral potassium feldspar (K-spar). It is a dense rock with a phaneritic texture. The abundance of K-spar gives the rock a predominant pink to reddish hue; peppered with minor amounts of black minerals. [2] [3]

  4. Granite - Wikipedia

    en.wikipedia.org/wiki/Granite

    Granite (/ ˈ ɡ r æ n ɪ t / GRAN-it) is a coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous ...

  5. Rapakivi granite - Wikipedia

    en.wikipedia.org/wiki/Rapakivi_granite

    Eroded rapakivi granite in Finland. Rapakivi is a fairly uncommon type of granite, but has been described from localities in North and South America (Illescas Batholith, Uruguay, [5] Rondônia, Brazil [6]) parts of the Baltic Shield, southern Greenland, southern Africa, India and China.

  6. Quartz Vs. Granite: Which Stone Is Right For Your Countertops?

    www.aol.com/lifestyle/quartz-vs-granite-stone...

    An interior designer weighs in on which countertop material is best. Home & Garden. Lighter Side

  7. Larvikite - Wikipedia

    en.wikipedia.org/wiki/Larvikite

    A larvikite quarry in Larvik, Norway, 2008 Polished larvikite (marketed as "Blue Pearl Granite"), showing labradorescence, is a popular decorative stone. Light larvikite with a polished surface Larvikite is an igneous rock , specifically a variety of monzonite , [ 1 ] notable for the presence of thumbnail-sized crystals of feldspar .

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