Websterite vs Tachylite Tekstur
tektur
clastic, granular, phaneritic, porphyritic
vitreous
werna
ireng kanggo werna abu-abu, bluish - werna abu-abu, greenish peteng - werna abu-abu, ijo, klawu rodok ijo cahya
ireng, coklat peteng
katon
dilapisi, banded, veined saha
glassy