Cavansite is a beautiful and rare mineral. It was only discovered in the last 30 years and is found in only a few locallities. By far the best crystals come from the famous zeolite quarries in Poona, India. Crystal aggregates consist of spherical rosettes with jutting pointed crystals. The deep blue color of even the smallest cavansite crystals is truly amazing. A beautiful blue cavansite rosette perched on top of the muted colors of the typical zeolites makes a dramatic crystal association. Cavansite's rarity and beauty explain its recent popularity.


  • Color is greenish-blue to ocean blue.
  • Luster vitreous to pearly.
  • Transparency transparent to translucent.
  • Crystal System: Orthorhombic
  • Crystal Habits radiating acicular crystals forming spherical crystal clusters.
  • Cleavage perfect in one direction.
  • Fracture conchoidal.
  • Hardness 3 - 4
  • Specific Gravity is approximately 2.33
  • Streak is blue.
  • Associated Minerals include zeolites such as stilbite and heulandite as well as calcite, apophyllite , babingtoniteand quartz.
  • Other Characteristics: larger crystals show an unusual internal reflection.
  • Notable Occurrence is Poona, India and Columbia Co. and Malheur Co., Oregon, USA.
  • Best Field Indicators are color, associations, locality and crystal habit.
This Site Awarded
Available CAVANSITE specimens:
CAVANSITE specimen CAV-67
$ 50.00 -60% = $ 20.00
Dims: 2.22x1.88x1.78in (5.64x4.78x4.52cm) .... Wt: 6.6oz (186g) .... Loc: Wagholi, Pune District, Maharashtra, India
This cavansite specimen is a bit unusual. It consists of a large cluster and two tiny sprays against a druze of grayish crystals, possibly an impure stilbite, but I can't be certain. What is special is that the large cluster includes several almost blocky cavansite crystals - not at all the usual radial spray. Those crystals have a rectangular face. A loupe reveals that many of the crystals here are individually recognizable. Plus, they are nestled in a cavity that protects them from damage.
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$ 20.00
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CAVANSITE specimen CAV-69
$ 180.00 -30% = $ 126.00
Dims: 3.68x1.83x1.09in (9.35x4.64x2.76cm) .... Wt: 3.32oz (94.0g) .... Loc: Wagholi, Pune District, Maharashtra, India
This ball of cavansite, while not perfectly spherical, is large, shapely, with wonderful deep-aqua-blue color, and a vitreous luster. The large cluster is 30 mm fron end-to-end, three times the size of typical cavansite crystals. The cavansite is transparent, though dimly so except on the smallest crystals, of which an extra spray is individual crystals is present to provide proof.
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$ 126.00
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see this List of ALL specimens including SOLD ones


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