Cavansite is a very rare hydrous calcium vanadium oxide silicate mineral that crystallizes in prismatic crystals and rosettes.
These rosettes can be a few centimeters tall and are usually found on a bed of other zeolite minerals such as Apophyllite and Stilbite. Cavansite was first discovered in 1967 by a group of geologists in Malheur County, Oregon.
They named it after it’s chemical composition “Ca-V-Si” (CAlcium, Vanadium, SIlicate).This variety was not of the best quality and the hunt was on to find this stone somewhere else.
Eventually in the mid 1970’s Cavansite was rediscovered in Poona, India. Beautiful rich blue colored Cavansite sitting on beds on Stilbite created a whirlwind of hype behind this stone.
To this day, Cavansite has been seen in only two other locations, New Zealand and Brazil. The specimens coming out of Poona are still of the highest quality, yet very scarce.
Brazilian  specimen
Natural good lustre
Source Brazil
Good for your collection
This Specimen was on display in the Gold Coast Opal and Gemstone Museum that closed in 2021
code upstairs
shipped gold coast with tracking