Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
hexagonaluncommonSilicates (Zeolite Group)
Gmelinite
(Na2,Ca,K2)Al2Si4O12·6H2O
This specimen features well-formed, tabular hexagonal crystals of Gmelinite, ranging from colorless to white and pale yellowish, often associated with reddish-brown Chabazite-Ca.
Gmelinite Physical Properties
Mohs Hardness
4.5Crystal System
hexagonalLuster
vitreousStreak Color
whiteCleavage
distinct on {1010}Fracture
uneven to conchoidalSpecific Gravity
2.04Colors
white, colorless, yellowish, reddish, brownishTransparency
transparent to translucentType Locality
Wasson Bluff, Parrsboro, Bay of Fundy, Cumberland County, Nova Scotia, CanadaMineral Group
Silicates (Zeolite Group)Uses
collector, industrial (as a zeolite for adsorption/ion-exchange)Associated Minerals
chabazite, calcite, other zeolitesRarity
uncommonGeological Context
Gmelinite is a zeolite mineral that typically forms in amygdaloidal cavities and veins within basaltic volcanic rocks, often as a product of low-temperature hydrothermal alteration.
