Cairngorm and Quartz

Cairngorm noun - A smoky yellow or brown quartz.

Quartz and cairngorm are semantically related. In some cases you can use "Quartz" instead a noun "Cairngorm".

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.

Cairngorm and quartz are semantically related. Sometimes you can replace term "Cairngorm" with "Quartz", this nouns are similar.