Note 61 — MINERALS.
Reading edition
The TOPAZ is a gem usually of a wine-yellow colour, but sometimes orange, pink, blue, and even colourless, like rock 36crystal; of a lamellar or foliated structure, harder than quartz, but not so hard as ruby.
Reading edition
The TOPAZ is a gem usually of a wine-yellow colour, but sometimes orange, pink, blue, and even colourless, like rock 36crystal; of a lamellar or foliated structure, harder than quartz, but not so hard as ruby.