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mineral species being named: Heulandite-Ca Heulandite-Na Heulandite-K Heulandite-Sr Heulandite-Ba (described in 2002). Heulandite-Ca, the most common of these
sodium. It forms a series with heulandite: Clinoptilolite-Ca – heulandite-Ca solid solution series Clinoptilolite-K – heulandite-K solid solution series Clinoptilolite-Na
rosettes of deep blue azurite on a field of malachite Goosecreekite with heulandite-Ca on quartz Intergrown botryoids of blue-green rosasite inside the curve
– (Na2,K2,Ca)2Al4Si14O36·15H2O Chabazite – CaAl2Si4O12·6H2O Heulandite – CaAl2Si7O18·6H2O Stilbite – NaCa2Al5Si13O36·17H2O Scolecite – CaAl2Si3O10·3H2O
stilbite is still used whenever testing has not been performed. At one time heulandite and stilbite were considered to be identical minerals. After they were