dioptase /dī-opˈtās/ (mineralogy)

An emerald-green acid copper silicate

• quetzales
• quetzals
• queue
• queued
• queueing
• queueings
• queue-jump
• queue-jumped
• queue-jumping
• queue-jumps
• queuer
• queuers
• preformationist
• preformationists
• preformations
• preformative
• preformed
• preforming
• preforms
• prefrontal
• prefrontals
• prefulgent
• preggers
• pre-glacial
• pregnable