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