Saul Krotki's Photo Gallery

ET5-50GArfvedsonite [Na][Na₂][Fe²⁺₄Fe³⁺]Si₈O₂₂(OH)₂

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA

Arfvedsonite with telescoping termination and quartz, in iron stained miarolitic cavity, North Cascade Highway, milepost 166 collecting area.
Photomicrograph © Saul Krotki 2013 (.1325). Field of view 4.0 mm.
Krotki field trip May 2013.

P9X-DN4Zircon Zr(SiO₄)

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA

Zircon with four-section pyramid termination. Washington Pass, North Cascade Highway, milepost 166, Okanogan Co., WA. Drawing idealized from photomicrograph © Saul Krotki 2010 (.1066), field of view 2.0 mm.

W48-QWKZektzerite LiNaZrSi₆O₁₅ , Astrophyllite K₂NaFe²⁺₇Ti₂Si₈O₂₆(OH)₄F

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA

These crystals were collected by Kristin Lindell in the Willow Creek area near Washington Pass, Okanogan Co., Washington. The miarolitic cavity that produced these crystals was unique, for the included needles of astrophyllite, did not occur in any of the other cavities that were discovered in 2009. On the left a cluster 14 mm across. On the right detail with astrophyllite inclustions, 3.4 mm wide. Photomicrograph © Saul Krotki 2010(.1035).

EVK-9NYCarnotite K₂(UO₂)₂(VO₄)₂·3H₂O

Anderson Mine, Date Creek Basin, Yavapai County, Arizona, USA

Photomicrograph © Saul Krotki 2010 (.1036.3). Field of view 4.0 mm.

JJ6-LNMMelanophlogite 46SiO₂·6(N₂,CO₂)·2(CH₄,N₂)

Fortullino, Rosignano Marittimo, Livorno Province, Tuscany, Italy

Photomicrograph © Saul Krotki 2010 (.1027). 12.0 mm area of thumbnail size matrix specimen. Krotki Micromount Collection.

J4L-WHQAlbite Na(AlSi₃O₈) , Zircon Zr(SiO₄)

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA

Iron diffusion halo surrounding a cluster of flattened zircon crystals, on microcline overgrown with albite. The zircon has been verified by EDS analysis. Several minute, but very odd zircon clusters, have been found in boulders at the North Cascade Highway, milepost 165 avalanche chute. Photomicrograph © Saul Krotki 2010 (.1023). Field of view 2.5 mm. Krotki field trip, August 2009. Krotki Micromount Collection.

F2Y-HLDGadolinite-(Ce) (Ce,La,Nd,Y)₂Fe²⁺Be₂Si₂O₁₀

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA

An isolated well-formed single crystal of gadolinite-(Ce), North Cascade Highway, milepost 165, Okanogan Co., WA. Photomicrograph © Saul Krotki 2010 (.1021). Field of view 2.5 mm. Saul Krotki field trip, August 2009. Krotki Micromount Collection.

4DR-J0UFluorite CaF₂

Mount Bischoff Mine, Waratah, Waratah district, Waratah-Wynyard municipality, Tasmania, Australia

Fluorite cube with hexoctahedral modifications. Prevalent twining obscured the idea "crystal model" complete form. Photomicrograph © Saul Krotki 2010 (.1080.2. Field of view 4.0 mm. Micromineral specimen provided for this study by Brian Carney.
Krotki Micromount Collection.

1QE-CEWMinyulite KAl₂(PO₄)₂F·4H₂O

Tom's Quarry, Kapunda, North Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia

Specimen provided by Brian Carney. Photomicrograph © Saul Krotki 2010 (.1020.1).
Field of view 2.4 mm wide. Krotki Micromount Collection.

ADC-P4NMinyulite KAl₂(PO₄)₂F·4H₂O

Tom's Quarry, Kapunda, North Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia

Specimen provided by Brian Carney. Photomicrograph © Saul Krotki 2010 (.1020.2).
Field of view 4.0 mm wide. Krotki Micromount Collection.