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Yellow Iodargyrite Microrystals

The Mineral iodargyrite

Iodargyrite is an ore of silver, and is very similar to Chlorargyrite and Bromrargyrite. Iodargyrite contains the halogen iodine combined with silver, whereas Chlorargyrite contains chlorine, and Bromargyrite contains bromine. Iodargyrite is usually lighter in color than the other two.

Iodargyrite is named after its chemical composition: "iod" for iodine, and "argyros" for the Greek word used for silver.
Chemical Formula AgI
Composition Silver iodide, usually with chloride or bromide
Color Colorless, light yellow, beige, greenish yellow, and light gray
Streak White to yellowish-white
Hardness 1.5 - 2
Crystal System Hexagonal
3D Crystal Atlas
(Click for animated model) 
Crystal Forms
and Aggregates
As tabular or prismatic crystals which are usually in groups of small crystals. Also as barrel-shaped forms, in parallel or disjoined crystal groups, as rosettes, drusy, grainy, and massive. Crystals may be hemimorphic with different shapes on each side.
Transparency Transparent to translucent
Specific Gravity 5.5 - 5.7
Luster Adamantine, Greasy
Cleavage 1,1
Fracture Uneven
Tenacity Sectile and ductile
In Group Halides
Striking Features Color, luster, habits, and mode of occurrence
Environment As a secondary mineral in oxidation zones, forming in epithermal veins and hydrothermal replacement deposits of silver deposits.
Rock Type Sedimentary
Popularity (1-4) 3
Prevalence (1-3) 3
Demand (1-3) 1

Iodargyrite AUCTIONS

Iodargyrite is an ore of silver.

Iodargyrite is a very uncommon mineral. Its most well-known locality is Broken Hill, New South Wales, Australia. Well-formed micro-crystals of this mineral have also come from Échassières, Allier, France; Vrančice, in Příbram, Bohemia, Czech Republic; and the Clara Mine, Oberwolfach, Baden-Württemberg, Germany; and the Schöne Aussicht Mine, Dernbach, Rhineland-Palatinate, Germany. Bright yellow microcrystals associated with Cuprite have recently been coming from the Rubtsovoskoe Mine, near Poteryaevka, Altai, Russia.

Chlorargyrite, Bromargyrite, Azurite, Limonite, Cuprite

iodargyrite PHOTOS
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