Item Number
3005
Type
image
Description
Amethyst Geode
Size
5
Age
Cretaceous Period
SciId
SiO2
Status
in inventory
Display/Storage
Display
Building
Zuhl Museum
Original Site
Brazil
Date Acquired
2000
Source
Aurora Minerals - Segal
Gallery/Room\Floor
Wow Gallery
Notes
Amethyst (SiO2) is simply a purple variety of quartz with impurities including iron to give it the purple/violet color. This Brazilian geode is formed when a bubble occurred in cooling lava leaving a "cave" once the lava is solid. Water then seeped in and precipitated out minerals inside the cavity (this process took thousands of years).
Preview
Description
Amethyst (SiO2) is simply a purple variety of quartz with impurities including iron to give it the purple/violet color. This Brazilian geode is formed when a bubble occurred in cooling lava leaving a "cave" once the lava is solid. Water then seeped in and precipitated out minerals inside the cavity (this process took thousands of years). 36x16x12
Keywords
Amethyst Geode Amethyst (SiO2) is simply a purple variety of quartz with impurities including iron to give it the purple/violet color. This Brazilian geode is formed when a bubble occurred in cooling lava leaving a "cave" once the lava is solid. Water then seeped in and precipitated out minerals inside the cavity (this process took thousands of years). 2000 Cretaceous Period Mineral
Keywords
Amethyst Geode Amethyst (SiO2) is simply a purple variety of quartz with impurities including iron to give it the purple/violet color. This Brazilian geode is formed when a bubble occurred in cooling lava leaving a "cave" once the lava is solid. Water then seeped in and precipitated out minerals inside the cavity (this process took thousands of years). 2000 Cretaceous Period Mineral