Marcasite

Grouping diameter 75mm. The largest crystal measures 35mm of with dimensions. Photograph and ex-collection: CLAUDE jm

© Jean-Marie Claude

Marcasite fireworks....

© Harjo Neutkens

Marcasite twin crystals with a brown coating of goethite. Image width: 2 mm

© De Nul, Richard

Typical stubby lamellar marcasite aggregate. Species from 1970. Overall size of marcasite crystals:5-15mm

© Tamás Ungvári 2005

Grouping diameter 65 mm. Crystals between 5 and 15mm. Lucky find between 1976 and 1985. It is difficult today to collect such samples on the site. The harvest of samples is now prohibited as this site is classified as a natural reserve. The other specimens presented were found at the same time. Photograph and collection: CLAUDE jm

© Jean-Marie Claude

A SUPERB and CLASSIC, undamaged rosette of pagoda-like, brassy, marcasite crystals from Cap Blanc Nez, Pas-de-Calais, France. Classic old material! 3.4 x 3.2 x 2.7 cm

© Rob Lavinsky & irocks.com

Calcite crystals 2mm, on Marcasite crystals 10mm

6x2x2 cm Rare edged tabular xls of Marcasite

© willy

7x7x4,5 cm Green-yellowish Marcasite , white translucent Calcite crystalls

© willy

Crystals up to 3mm - April of 2001

© Photo & Collection of Martins da Pedra

This is, without a doubt, one of the most aesthetic marcasite groups I have seen from the chalk cliffs of the French North Sea. Only at low tide can these specimens be removed, and collecting good ones is supposed to be pretty difficult. This particular piece features a rosette of lustrous marcasite, jauntily perched on chalk. The cluster measures ...

© Rob Lavinsky & irocks.com

7x5x4,5 cm Lustrous yellow Marcasite sheets form a flower , black Sphalerite and light grey Quartz crystalls on matrix The specimen look like a ostrich head

© willy

Group of twinned (this twin is known in German as “sperkise”) crystals of Marcasite, sharp, very well defined and bright, with groups of small cubic crystals of Pyrite and with Siderite and Calcite.
Minas da Panasqueira, Level 2, Beira Baixa, Portugal.
Found in 1998.

© Fabre Minerals https://www.fabreminerals.com

Image width: 2 mm

© De Nul, Richard

8x5x3 cm Yellow-brownish lamellar Marcasite , grey Galena and white Calcite

© willy

9x6x3 cm Gray Marcasite, brown greenish Siderite

© willy

Field of view 15 mm. Collection M. Kampf No 07-001.

Grouping diameter 45mm. Crystals between 6 and 25mm Photograph and collection: CLAUDE jm

© Jean-Marie Claude

A superb specimen of marcasite associated with calcite from the famous Panasqueira Mine. I obtained this specimen during the Munich show 2008 from Jordi. Ex Silvane collection. Collection and photo, Paul De Bondt.

© Collection and photo, Paul De Bondt

Globular siderite width 6mm, with "cockscomb" marcasite.

Twinned, lamellar marcasite with quartz crystals. Width of the picture:6mm

© Tamás Ungvári Collection

Image width: 2 mm

© De Nul, Richard

Grouping 70x55mm on rock of origin. The largest crystal measures 25mm of with dimensions. Photograph and collection: CLAUDE jm

© Jean-Marie Claude

Crystals up to 3mm - April of 2001

© Photo & Collection of Martins da Pedra

Very sharp twinned crystals (sperkiese), one of them clearly dominant, platy, with slight iridescense and on a matrix of cubic pyrite crystals.

© Carles Curto Milà

Marcasite / Pyrite floater (6,5cm x 6cm x 5cm) Mario Pauwels collection , joaquim Callén photo. Not just a ordinary Marcasite but rather a bizar and very unusual natural artistic shaped creation. The specimen is crystallized all around and is also associated with tiny Pyrite crystals. This piece was found in the early 1980's, and is stable.

© Mario Pauwels

Marcasite xls typical for Misburg, greenish-yellow-metallic color. Undamaged specimen, my collection, height of spec. about 8 cm.

© Roger Lang 2003

Marcasite.

© Harjo Neutkens

Amazing Marcasite crystals.

© Harjo Neutkens

8*6*5 cm Bladed marcasite crystals

© ciuturas

Twinned marcasite crystals on dolomite crystals. Collected in 2013 during a field trip of the Institute of Mineralogy and Crystallography of the University of Vienna. Photo Harald Schillhammer. This photo was originally published in: Kolitsch, U. & Steinwender, C. (2014): Die Geologie und Mineralogie des Esslbruchs bei St. Michael im Lungau, ...

© Harald Schillhammer

Iridescent marcasite on Calcite.

© Harjo Neutkens

Marcasite partly oxidized to a nice blue.

© Harjo Neutkens

Groups of several pinks of marcasite on rock of origin. Crystals measuring of 6à12mm of with dimensions. Specimen 100x80x50mm. Photograph and collection: CLAUDE jm

© Jean-Marie Claude

7x6,5x4,5 cm Like a bear foot

© willy

size crystal 4cm found in 2008

© Mikael.Gonzales.2008

17x11x7 cm Marcasite (some with twins), grey Galena and black Sphalerite crystals

© willy

Perfect and nice detail of a marcasite Reocin where we see twins in "cockscomb". In this mine marcasite often it associated with galena, sphalerite and dolomite crystals. Collection and photograph Juan Miguel.

© Juanmi

Marcasite.

© Harjo Neutkens

Marcasite crystals grown around a pyrite cubo-octahedron, on dolomite - top view. Zeiss Luminar 25mm on bellows + Nikon D3300. Combine Z. Gift from Michel Blondieau. Photo & collection Chollet Pascal (# 3636).

© Chollet Pascal

Marcasite crystals Field is 1,7mm large Zeiss luminar 25mm on bellows + nikon D5100. Combine Z Self collected 2015 Photo & collection Chollet Pascal (# Ast)

© Chollet Pascal

Collection and photo Yves Masson

© Yves Masson

Typical Sperkize Floating Ex Coll JM CLAUDE Specimen Size 5cm

© Mikael.Gonzales 2014

Marcasite arrowhead crystal group 4cms long. Collected 1972.

© Steve Rust

Marcasite on Calcite.

© Harjo Neutkens

An old Flambrough Quarry piece -- this one, a beautifully irridescent cluster of marcasite crystals (much prettier in person) perched on the edge of a shard of matrix like a flower! 3.3 x 2.1 x 1.4 cm

© Rob Lavinsky & irocks.com

Aggragate of marcasite crystals up to 0.7 cm. Photographer and collection Eligiusz Szełęg.

© Eligiusz Szełęg

Tabular marcasite crystals on calcite matrix. Width of the picture:8mm

© Tamás Ungvári Collection

FOV 5.0 x 4.5 mm. Thanks to Mel Pollinger. MOB coll. Neat in stereo – see child photo.

Botryoidal marcasite. Overall size: 74 x 46 x 30 mm Photo and collection Antonio Borrelli

© Antonio Borrelli

Well defined crystals of Marcasite cockscombs, on Arsenopyrite matrix, with Siderite and Dolomite.
Minas da Panasqueira, level 3, Beira Baixa, Portugal.
Found in 2004.

© Fabre Minerals https://www.fabreminerals.com

specimen 40x30x25mm. Crystals between 12 and 25mm.Photograph and collection: CLAUDE jm

© Jean-Marie Claude

Marcasite cristals with 2 small pyrite marbles Field is 17,6 x 11,4 mm Nikkor 85mm on bellows + nikon D1x. Combine Z Photo & collection Chollet Pascal (# 1720)

© Chollet Pascal

This picture shows a typical "hanekam" shaped Marcasite, which I found at the Ratum quarry, during my visit on November 1st 2008. "Hanekam" is Dutch for "Cockscomb". Picture was shot using a Panasonic DMC FZ-18 digital camera, with an Raynox MSN-202 Macrolens attached to it. Picture has got a field of view of 3.7 mm. Picture & Collection ...

© Bert de Ruiter

Reticulated crystals of marcasite, 4 mm in length, on saddle-shaped pink dolomite crystals in a quartz crystal-lined geode from Brummetts Creek, Bloomington, Monroe County, Indiana. Terry Huizing specimen (No. TEH 110), John Rakovan photo.

© John Rakovan. All rights reserved.

Marcasite (rooster crest) March of 2005.

© Photo & Collection of Martins da Pedra

specimen 25x25 mm.Photograph and collection jm.CLAUDE

© Jean-Marie Claude

5*7*4 cm. Yellow metallic pyrite with blue and golden tarnished marcasite.

© tinuleo2004@yahoo.com

Marcasite in nice crystals isn't rare in that active quarry.

© Michel Blondieau

3x3x2 cm

© willy

Nice marcasite and fluorite on calcite.

© Michel Blondieau

Specimen measuring 40mm in diameter,the crystals are between 4 and 16 mm edges. Photograph and collection jm.CLAUDE

© Jean-Marie Claude

6x4x3 cm

© willy

FOV 4x3 cm

© willy

11x8x3 cm Yellow-greenish Marcasite on Calcite xls

© willy

Crystals up to 3mm - April of 2001

© Photo & Collection of Martins da Pedra

FOV 4x3 cm Bladed marcasite crystals with a small sphere of pyrite.

© willy

5x5x4 cm

© willy

Crystals up to 3mm - April of 2001

© Photo & Collection of Martins da Pedra

4.4 x 2.9 x 2.2 cm. A classic, complete-all-around and pristine, floater nodule of marcasite crystals from Cap Blanc-Nez, France. The striking elongate cluster is composed of tightly intergrown, brassy, metallic-lustre, triangular, tabular marcasite crystals. Every rotation gives a different perspective of the crystals. Very seldom available in ...

© Rob Lavinsky & irocks.com

Marcasite.

© Harjo Neutkens

Classic cluster of tightly intergrown, brassy metallic, triangular tabular crystals of Marcasite, locally referred to as “Sperkise” (overall 4.5 x 3.0 x 3.0 cm). JFC collection (#01147) and photograph.

© JF Carpentier 2011

Marcasite.

© Harjo Neutkens

This is a micro photo with FOV 2 cm

Marcasite.

© Harjo Neutkens