Scolecite and Stilbite-Ca
| ID | 151 | |
|---|---|---|
| Mineral |
Scolecite
Stilbite-Ca |
|
| Location | Poona - Maharashtra - India | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Scolecite information at mindat.org View Stilbite-Ca information at mindat.org |
|
Mindat data
| ID | 3594 |
|---|---|
| Long ID | 1:1:3594:7 |
| Formula |
Ca(Si3Al2)O10 · 3H2O
|
| IMA Status |
0 1 |
| Other Occurrences | Cavities in basalts; Alpine clefts. |
| Discovery Year | 1813 |
| Diapheny | Transparent,Translucent |
| Cleavage |
Perfect on the {110} and |
| Tenacity | brittle |
| Colour | colorless, white , pink, salmon, red, green |
| Hardness (min) | 5.0 |
| Hardness (max) | 5.5 |
| About the name | From the Greek, σκώληξ (skolex) = 'worm' in reference to the mineral's reaction to the blowpipe flame. |
| Streak | white |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Fracture type | Irregular/Uneven |
| Morphology | Crystals are slender prismatic |
| Twinning | On {100}, twin axis [001], contact or penetration twins |
| UV | May be yellow to brown in LW and SW. |
| Comment Luster | Silky when fibrous |
| shortcode_ima | Slc |
| Group | Natrolite Subgroup |
| ID | 7313 |
|---|---|
| Long ID | 1:1:7313:0 |
| Formula |
NaCa4(Si27Al9)O72 · 28H2O
|
| IMA Status |
0 1 |
| Other Occurrences | A low temperature hydrothermal mineral, in amygdules and cavities in basalt. |
| Diapheny | Transparent,Translucent |
| Cleavage | on {010} |
| Colour | White, colourless, red, light yellow, light to dark brown, cream, orange, pink |
| Hardness (min) | 3.5 |
| Hardness (max) | 4.0 |
| Lustre | Vitreous , Pearly |
| About the name | Named in 1797 by Jean Claude de la Métherie from Greek στιλβη "stilbein", to glitter or shine, or "stilbe", a mirror, alluding to its pearly or vitreous luster. Originally, but inconsistently called zeolite in 1756 by Axel Cronstedt. Named crystalii ad centrum tendentes in 1758 by Cronstedt. In 1772, Johan Gottschalk Wallerius called this mineral zeolite selenitica lamellaris. Also in 1797, de la Métherie called this mineral zeolite nacrée. Werner (1780) called this mineral strehliger zeolith. Rene Just Haüy (1801) used the term stilbite anamorphique for a mineral now recognized as heulandite. Desmine was introduced in 1818 by Johann Friedrich August Breithaupt. Sphaerostilbite was used in 1832 by François Sulpice Beudant. Additional varietal names and synonyms have been proposed: blättricher zeolit, hypostilbite, puflerite, radiated zeolite, and syhedrite. Chemical suffixes were added by the IMA. |
| Streak | White |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Fracture type | Irregular/Uneven |
| Morphology | Typically thin tabular, sheaflike or globular clusters. |
| Twinning | Ubiquitous on {001}, cruciform and penetration. |
| UV | May fluoresce pale-yellow or blue-white in shortwave UV. |
| Comment Luster | Pearly on cleavage |
| shortcode_ima | Stb-Ca |
| Group | Stilbite Subgroup |
Details
Price: € 20
Dimensions: Not registered
Weight: 368 g
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Al | Aluminium | |
| Ca | Calcium | |
| H | Hydrogen | |
| Na | Sodium | |
| O | Oxygen | |
| Si | Silicium |