Red granite - Akamikage

Japanese: 赤御影 - あかみかげ
Red granite - Akamikage

…Japanese granite is generally white or pink, but there are many granites in the world that contain potassium feldspar and are red in color. This type of granite, called red granite, is imported in large quantities in the form of raw stones and used for construction. Gabbro, which belongs to the same plutonic rock as granite, contains colored minerals and is dark in color, and is called black granite. …

From [Granite]

…For this reason, the original granite produced in the Mikage region is sometimes called "hon-granite" to distinguish it from other types. Granite is further divided into various names based on its color, such as white granite, cherry granite, red granite, and black granite. White granite is the type of biotite granite commonly found in Japan, cherry granite is feldspar with a cherry-colored color, red granite is a red-colored granite that contains a large amount of potassium feldspar, and black granite refers to porphyrite, gabbro, and some types of porphyrite that contain colored minerals. …

*Some of the terminology explanations that refer to "Aka-Mikage" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…日本の花コウ岩は一般に白色または桜色であるが,カリ長石を含み赤色を呈する花コウ岩も世界には多い。赤御影と呼ばれるその種の花コウ岩は原石の形で大量に輸入され,建築用に利用されている。花コウ岩と同じ深成岩に属する斑レイ岩は,有色鉱物を含み色調暗く,黒御影と呼ばれている。…

【御影石】より

…このため,御影地方に産する本来の御影石を本御影と呼んで区別することがある。御影石ではさらにその色調によって分けた白御影,桜御影,赤御影,黒御影などの呼称が広く行われている。白御影は日本で普通にみられる黒雲母花コウ岩の類,桜御影はその長石が桜色をしているもの,赤御影はカリ長石を多量に含む赤い色調の花コウ岩であるが,黒御影は有色鉱物を含むセン緑岩や斑レイ岩,セン長岩の一部などを指している。…

※「赤御影」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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