Perlite, obsidian and pitchstone are volcanic glass having the same compositions commonly with rhyolite as well as andesite and basalt.
珍、
耀
和松脂
等玻璃质熔
以酸
主,中基
者也常见。
Perlite, obsidian and pitchstone are volcanic glass having the same compositions commonly with rhyolite as well as andesite and basalt.
珍、
耀
和松脂
等玻璃质熔
以酸
主,中基
者也常见。
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