Ferroselite crystals; Ambrosia Lake, McKinley County, New Mexico, USA; MM; unique piece

Ferroselite crystals from the Ambrosia Lake District, New Mexico – micromount as a unique piece

This micromount features a compact, irregularly shaped specimen in warm ochre, rusty brown and dark brown tones. Small, closely set Ferroselite crystals can be seen across its rough surface. The contrast between the lighter areas and dark recesses brings out the specimen’s granular, textured relief.

Geology & Origin
The Ambrosia Lake District in McKinley County forms part of the Grants Mineral Belt in northwestern New Mexico and is known for its significant sandstone-hosted uranium deposits. Ferroselite, an iron selenide, is documented from several localities in the district. The uranium mineralization occurs mainly in sandstones of the Morrison Formation and is associated with the movement of mineral-bearing fluids through the sedimentary rocks. This specimen comes from a region where uranium and selenium mineralization occur together.

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

Email: info@mikon-online.com

More Information

More Information
shipment-weight, NOT netto weight (kg)	0.100000