Hydroxyl-Apophyllite, Okenite xls; Pune, India; Gerd Tremmel collection; Cab; unique piece
Hydroxyl-Apophyllite and Okenite crystals from Pune, India, Gerd Tremmel collection – cabinet specimen as unique piece
This cabinet specimen features Hydroxyl-Apophyllite and Okenite crystals from Pune, India, originating from the Gerd Tremmel collection. The pale green, translucent Hydroxyl-Apophyllite crystals are predominantly cubic to tabular in habit and are loosely distributed across a dense, snow-white Okenite matrix. The finely fibrous structure of the Okenite forms a soft, cotton-like base from which the sharply defined Apophyllite crystals clearly stand out. The balanced interaction of crystal form, color, and contrast gives the specimen strong visual appeal. The piece dates from before 1997 and represents classic collector material from Poona that is rarely available today.
Geology & Origin
The basalt formations of the Pune region in India are among the world’s most important localities for secondary zeolite and silicate minerals. Hydroxyl-Apophyllite crystallized from calcium- and potassium-rich hydrothermal fluids within cavities of volcanic rocks, while Okenite formed later under low-temperature conditions as a fibrous calcium silicate. The association of both minerals as well-developed crystals is characteristic of historic finds from this area and is particularly valued in older collection specimens.
This table is for general information and orientation, although the sizes of the stones may vary. In addition, this specification is handled differently from region to region.
| Sizes | Description | approx. Sizes in mm/cm | approx. Sizes in INCH | |
| Capsule | Capsule | 0.1–0.5 mm in a transparent hard capsule (approx. 1 cm) | capsule contents 0.1–0.5 mm | capsule contents 0.004–0.02 in |
| TN/mm | Micromount (TN = Thumbnail) | everything fitting in a TN Perky box or a MM box of approx. 1 in | approx. 0.5–2.5 cm | max. 1 in |
| Min | Miniature specimen | will not fit a TN or MM box anymore | approx. 2.5–5 cm | approx. 0.2–1.0 in |
| Scab | small cabinet specimen | approx. one-third to half a hand size | approx. 5–9 cm | approx. 1.0–2.0 in |
| Cab | cabinet specimen | full hand size | approx. 9–15 cm | approx. 2.0–3.5 in |
| large Cab | large cabinet specimen | approx. two hand sizes | approx. 15–30 cm | approx. 3.5–6.0 in |
| very large Cab | very large cabinet specimen | everything larger, no upper limit |
Abbreviations commonly used in mineralogy.
| Abbreviation | Meaning |
| xl | single crystal, possible with matrix |
| xls | noticeable crystals |
| (xl) | embedded or damaged |
| (xls) | embeddet or damaged |
| MASS | massive and/or amorphous pieces |
| TYP | type locality of the original description |
| SWUV | shortwave-UV-reaction |
| UV | ultraviolet reaction |
| SC | self-collected |
| U | unique (single unique piece) |
Usage Instructions
This product is ideal as a collector's item, decorative element, teaching material, or for scientific and exhibition purposes.
Legal Notices
Safety
We accept no liability for damages resulting from improper and/or non-recommended use. Please carefully assess the suitability of the product before any alternative use.
Responsible Provider
Mikon Mineralienkontor GmbH
Steinslieth 11
D-37130 Gleichen OT Klein Lengden
Email: info@mikon-online.com
| shipment-weight, NOT netto weight (kg) | 0.500000 |
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