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Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O | |
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Linópolis, Divino das Laranjeiras, Doce valley, Minas Gerais, Southeast Region, Brazil An exceptional and aesthetic cluster of lustrous, translucent, tabular, light brown heulandite crystals on a bit of matrix from Linopolis, Brazil. Linopolis is the Type Locality of this calcium-rich varietal and this is a very good one. Excellent material from the Lewadny Collection. 4.8 x 3.0 x 2.2 cm |
| © Rob Lavinsky | Photo ID: 40449 View Count: 390 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O, Stilbite-Ca : NaCa4[Al9Si27O72] · nH2O | |
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Krásné, Šumperk (Mährisch Schönberg), Olomouc Region, Moravia (Mähren; Maehren), Czech Republic Stilbite-Ca and smaller crystals of heulandite-Ca on amphibolite matrix. Size of sample 4,5×3,5 cm. Collection of author. |
| © Jakub Jirásek | Photo ID: 238512 View Count: 30 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O, Stilbite | |
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Eyrarfjoll, Hvalfjordur, Iceland 7cm piece. Stilbite ontop of green Heulandite |
| © JKT | Photo ID: 229283 View Count: 252 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O | |
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Eyrarfjoll, Hvalfjordur, Iceland Tiny Green healandite xls. Sample 7cm |
| © JKT | Photo ID: 229281 View Count: 51 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O, Celadonite : K(Mg,Fe2+)(Fe3+,Al)[(OH)2|Si4O10] | |
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Ahmadnagar District (Ahmednagar District; Ahmed Nagar District), Maharashtra, India 7.2 x 4.5 x 4.2 cm. This elegant, pristine, complete-all-around specimen is the best example I have seen for its size. The quality is superb, featuring a waxy lustre and great curvature and elegance of form all around. It is green throughout except for the very tip of one "frond", which is a stark contrasting white. |
| © Rob Lavinsky | Photo ID: 254444 View Count: 23 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O, Stilbite-Ca : NaCa4[Al9Si27O72] · nH2O, Quartz : SiO2 | |
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Jalgaon District, Maharashtra, India 13.0 x 12.5 x 5.4 cm. A beautiful Jalgaon specimen out of the Feist collection. Here you have a large, gently curved matrix lined with stalactitic "drip-castle" dove-grey quartz. Centered in this field of quartz are intergrown a reddish-brown crystal of heulandite and a bloom of peachy stilbite. |
| © Rob Lavinsky | Photo ID: 213192 View Count: 83 |
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Jalgaon District, Maharashtra, India 11.9 x 9.4 x 8.7 cm. A big, rich cluster of transparent crystals of apophyllite, with, nestled amongst them, a lone cluster of deep salmon-pink heulandite. |
| © Rob Lavinsky | Photo ID: 191789 View Count: 79 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O | |
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Jalgaon District, Maharashtra, India 6.6 x 6.3 x 3.5 cm. A gemmy 5.7 cm "Angel Wing" Heulandite crystal on matrix. It is remarkable both for its size and gemminess. Ex. Charlie Key. |
| © Rob Lavinsky | Photo ID: 201341 View Count: 71 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O, Apophyllite-(KF) : KCa4[(F,OH)|Si8O20] · 8H2O, Chalcedony | |
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Jalgaon District, Maharashtra, India 4.9 x 4.4 x 3.2 cm. From the superb collection of W.H. Leithauser of Germany, an exquisite Indian combination specimen. There is a natural "pedestal" of finger-like chalcedony stalactites intergrown with sharp, gemmy colorless apophyllites. Atop this pedestal, crosswise, is a hematite-included "book" of heulandite. |
| © Rob Lavinsky | Photo ID: 197964 View Count: 69 |
Heulandite-Ca : (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O, Celadonite : K(Mg,Fe2+)(Fe3+,Al)[(OH)2|Si4O10] | |
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Jalgaon District, Maharashtra, India 7.6 x 5.3 x 3.2 cm. Round aggregates of heulandite which have been so heavily included and stabilized by celadonite, this may even be considered a pseudomorph as I think there is more celadonite here than heulandite. Ex. Charlie Key. |
| © Rob Lavinsky | Photo ID: 215528 View Count: 59 |
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