Common topaz and Quartz

Common topaz noun - A yellow quartz.

Quartz and common topaz are semantically related. In some cases you can use "Quartz" instead a noun phrase "Common topaz".

Quartz noun - A hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities.

Common topaz and quartz are semantically related. Sometimes you can replace phrase "Common topaz" with "Quartz", this terms are similar.