1. a variety of quartz that is red or reddish in color
Usage: mineralogy

Examples

• The geologist identified the specimen as rubasse based on its distinctive red coloration.
• Rubasse is sometimes confused with ruby, but it is actually a form of quartz.
• The mineral collection included several examples of rubasse from different regions.
• Unlike true ruby, rubasse has the hardness characteristic of quartz.
• The red rubasse crystals caught the light beautifully in the display case.