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volcanic glass 【礦物】火山玻璃,黑耀石。

volcanic rocks

Perlite is lava of acid volcanic glass ; there is certain combo water in it . can be swselled in high temperature , it is a main ore source to make adiabatic materials with high quality and super light 珍珠巖是酸性火山玻璃質熔巖,其中含有一定量的結合水,在高溫下迅速膨脹,是制作優質超輕絕熱材料的主要礦石資源。

Placer abnormal of volcanic lithoclast at longjingjie in kaili of guizhou locates in regional shidongkou deep and major fault nearby , abnormal materials that are obsidian lithoclast and volcanic glass 貴州凱里龍井街火山巖屑重砂異常位于區域性施洞口深大斷裂近旁,異常物質為黑曜巖屑及火山玻璃。

A usually black or banded , hard volcanic glass that displays shiny , curved surfaces when fractured and is formed by rapid cooling of lava 黑曜巖火山玻璃,一般為黑色,帶狀,摔碎時色澤光亮,表面變曲,由火山熔巖迅速凝而成

Piece of black , volcanic glass 一塊黑色的火山玻璃。