Judging quality
Look for a fine even sparkle and consistent body color. Green glass 'goldstone' is a manufactured imitation with far more regular glitter.
Quartz
Aventurine
Quartzite spangled with reflective mica platelets — green from fuchsite, blue from dumortierite. The shimmer is called aventurescence.
Care
Durable. Soap and water; color is stable.
History & lore
The effect is named backwards: Venetian glassmakers made sparkling glass by accident, a ventura, and the mineral was later named after the glass.
Cultural history, recorded as tradition rather than as medical or scientific claim.
Common questions about Aventurine
- What is Aventurine?
- Quartzite spangled with reflective mica platelets — green from fuchsite, blue from dumortierite. The shimmer is called aventurescence.
- How hard is Aventurine and what is it made of?
- Aventurine is a Quartz-family mineral with the composition SiO2 with fuchsite. It crystallizes in the trigonal system and rates 6.5-7 on the Mohs hardness scale. It occurs in green, blue, peach.
- Where does Aventurine come from?
- Notable localities for Aventurine include India, Brazil, Russia, Tanzania.
- How do you tell good Aventurine from filler?
- Look for a fine even sparkle and consistent body color. Green glass 'goldstone' is a manufactured imitation with far more regular glitter.
- How do you care for Aventurine?
- Durable. Soap and water; color is stable.
Related stones
See it in person
Photographs only go so far
Both rooms are open six days a week, and there is always someone happy to pull pieces out of the case so you can compare them under the light.