Porphyritic Andesite Rock
Dec. 24, 2024
Porphyritic andesite (Kate Peak Formation, Middle Miocene;… | Flickr Andesite Gemstone: Properties, Meanings, Value & Uses | Gem Rock Auctions Andesite is a volcanic rock of intermediate composition. This sample has porphyritic texture with large crystals of plagioclase. This sample comes to Stock Photo - Alamy Porphyritic Andesite Rock