Marketing names for smoky quartz usually come from another name that imitates the color of the stone - for example, whiskey quartz. Natural whiskey quartz resembles the Scottish cairngorm, but most of what is affordable today is heat-treated to a lovely cherry wood color. Another name, root beer quartz, describes smoky quartz that looks like a brown beer bottle. However, "smoky topaz" is not a legal marketing name, as topaz and quartz are two totally different materials, and although it is considered archaic to call smoky quartz topaz, several folks still do. This misconception probably occurred when Scotland became known for its smoky quartz that was found in close proximity with natural topaz. Topaz is more expensive and softer stone, whereas smoky quartz is very affordable, more durable, and beautiful in its own right!
A variety of faceted smoky quartz stones, some bi-color with water quartz. Private collection, Dale Armstrong.