Larvikite
(Norway?, Building stone) Syenite: Field width = 8.8mm A caption
is in the bottom. The Image is XPL on mouse to PPL
ラルビカイト（ノルウエイ？石材）シエナイト 横幅8.8mm．写真の下に説明．薄片写真：クロスポーラー（XPL)．マウスを乗せるとオープンポーラー（PPL)．
A famous building stone from Norway. The name originated from the Larvik region in Norway.
This rock is classified as syenite, which is a kind of K-felspar rich
diorite. The minerals seen here are olivine (corful under XPL) and small
amount of pyroxenes and biotites. Feldspars are almost
K-feldspar.
石材として有名なノルウエイ産のラルビカイト．この岩石は閃緑岩の一種シエナイトに分類される．アルカリ長石を多く含むため．見れる鉱物はXPLでカラフルなかんらん石と少量の輝石と黒雲母．灰色の大部分はカリ長石．
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