Chestermanite crystals from Potter Lake District, Fresno Co., CA, USA – micromount as unique piece
This micromount specimen with Chestermanite crystals from California, USA, shows a compact greenish matrix with fine sparkling crystal surfaces. The subtle coloration in various shades of green is complemented by lighter areas, giving the piece a natural and balanced appearance.
The Chestermanite crystals are visibly developed and form a fine crystalline slightly granular to drusy surface. Numerous small crystal faces reflect light evenly and emphasize the crystalline character of this rare mineral phase. Overall, the specimen presents a calm yet detailed aesthetic.
Geology & Origin
Chestermanite is a rare silicate mineral that forms in specific geological environments, often associated with manganese and iron rich rocks. The Potter Lake District in California is known for a variety of unusual and rare mineral occurrences formed through complex geochemical processes. Such mineralizations commonly develop in hydrothermal influenced zones.
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)
embedded 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
