Arsenopyrite, Fluorapatite, Muscovite and Siderite - image 1

Arsenopyrite, Fluorapatite, Muscovite and Siderite

Unknown Owner
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Iridescence is an incredibly desirable and visually unique effect in minerals: this occurs often in Arsenopyrite crystals, although the distribution of color in this Arsenopyrite plate is a bit unique: instead of having a mottling of rainbow hues within each crystal, the entire plate features an overall iridescent gradient from purple, blue, green, to orange, appearing like as a heat map or topographic map that amplifies towards the right side of the specimen. Also scattered throughout are Fluorapatite crystals and blades of finely crystallized Siderite. The many Fluorapatite crystals fluoresce a fiery orange, particularly under shortwave UV light. This specimen comes with a custom acrylic base.

Product details

Species
Siderite, Muscovite, Arsenopyrite, FluorapatiteAbout Siderite →
SizeMuseum
Dimensions21.0 x 32.0 x 4.0 cm
Added on06/14/2025
Locality
Portugal, Panasqueira MinesRegional guide →

Known provenance

DateCollectorAcquisition price
03/2025Unknown Owner$4,250.00
purchased from Heritage Auctions (Dan Kennedy's collection)
—Dan KennedNot disclosed

Learn more

Siderite
Mineral guide
Learn about Siderite
warm-toned iron carbonate with sharp rhombohedra and occasional gemmy crystals; prized for luster, classic localities Harz, Panasqueira, Dal’negorsk.
Siderite
Regional guide
Siderite from Panasqueira Mines, Portugal
from Panasqueira, Portugal — lustrous tan to cream rhombohedra in rosettes and masses; a world-class, modern classic from a magmatic-hydrothermal vein.