Okayama Prefecture, Japan

Christian Rewitzer specimen and photograph.

© Christian Rewitzer 2007

Collection and photo Stephan Wolfsried.

© Stephan Wolfsried 8/2008

Blue xls on white olshanskyite. Photo and collection Antonio Borrelli.

© Antonio Borrelli

An almost 0.5 cm crystal. S409-062 Alfredo Petrov specimen.

© 2008, JGW, courtesy of Photographic Guide to Mineral Species

Acquired in 2007. Photo & collection: D. Schläfli. The child photos illustrate the dichroism in henmilite.

© 2008 Dominik Schläfli. All rights reserved.

RRUFF Project Specimen ID: R060257 Locality: Fuka mine, Okayama Prefecture, Honshu Island, Japan Source: Michael Scott S100323 Deep blue prismatic pinacoidal crystals with a melted looking exterior

© Rruff Project

TZ97L5: Nice specimen from the type locality of this rare calcium copper borate. Henmilite shows well defined faces and edges with a deep blue color that contrasts with the white Olshanskyite matrix. Actually the access to the Fuka mine is strictly prohibited and controlled. The specimen is accompanied by the label from the collection of the ...

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

Rose coloured transparent prismatic Chiyokoite. Collection and photo Stephan Wolfsried

© Stephan Wolfsried 01/2020

Collection and Photo Stephan Wolfsried. Sony Nex 7, bellows, Mitutoyo M Plan Apo 5x, aperture, Raynox DCR-250 retro, THK linear actor, stack shot control.

© Stephan Wolfsried 6/2015

Deep-blue transparent crystals on matrix.

© R. Tanaka

Perfect crystals of deep blue henmilite on white olshanskyite. Photo and collection Antonio Borrelli.

© Antonio Borrelli

Aggregate of tiny crystals of recently (in 2019) approved Chiyokoite. This species can be recognized by its color and crystal form. Pentax K-1 + Mityutoyo MPA10X. Stacked by Helicon Focus.

© © tak_collection

© Luigi Mattei

The deep–blue to green coloration around the brown rutile is amaterasuite (SEM-EDS analysed). This is an exceptionally rich specimen in which numerous amaterasuite can be observed. Visually, the fracture surface of amaterasuite exhibits a dark, hazy texture surrounding area brown rutile, characterized by fine needle-like to hair-like ...

2 cm massive. S334-31 Excalibur Mineral Company specimen.

© 2008, JGW

Blue Henmilite crystals on Calcite covered with pearly white micro crystals of Olshanskyite from the Fuka mine, Bicchu-cho, Japan. Specimen and photo: Knut Eldjarn.

© Knut Eldjarn

A specimen with deep purplish blue Henmilite crystals scattered on snow-white Olschanskyite from the Fuka mine, Okayama pref., Japan. Specimen and photo: Knut Eldjarn.

© Knut Eldjarn

Photograph and collection jm.CLAUDE.

© Jean-Marie Claude

Photograph and collection jm.CLAUDE.

© Jean-Marie Claude

White veinlets of stronalsite in jadeite. S357-15 0.5 cm field of view. Excalibur Mineral Company specimen.

© 2008, JGW

Jordi Fabre specimen, Tucson show 2008

© J.Ralph 2008

5 cm field of view, vertical. S340-34 Alfredo Petrov specimen.

© 2008, JGW, courtesy of Photographic Guide to Mineral Species

0.7 cm crystal of pentahydroborite. S402-409 Alfredo Petrov specimen.

© 2008, JGW

0.8 cm area of oyelite in spurrite. S349-15 Alfredo Petrov specimen.

© 2008, JGW

Deep blue Henmilite crystal. Olympus E-P1/MMF-1/EC-20/ZD50mmMacro.

Pink, 3.0 mm diameter, charlesite crystal on white borate skarn matrix.

© Alfredo Petrov

A polished slab of showing several areas of Amaterasuite in jade pyroxene rock. The black-dark blue coloration around the Rutile (dark brown) is Amaterasuite. See the detailed photos. SEM-EDS analysis.

A lightweight, white rock hosts dozens of glassy and gemmy, deep purple-blue crystals, of henmilite. Henmilite, first discovered in Japan, is a very rare calcium, copper, boron hydroxide. This is a superb miniature of high quality from a remarkable find at the type locality, long thought unproductive, about 5-6 years ago.

© Rob Lavinsky & irocks.com

A white mass of marble containing micron-sized crystals of takedaite and olshanskyite. These two minerals forms granular grains embedded within marble matrix up to 40 vol%, was confirmed from a polished fragment under FESEM.

Henmilite crystals on matrix rock, from Fuka mine, Bitchu-cho, Takahashi, Okayama Prefecture, Chugoku Region, Honshu Island, Japan.

© Oleg Lopatkin

0.5 cm crystal, on edge. S409-063 Alfredo Petrov specimen.

© 2008, JGW, courtesy of Photographic Guide to Miner

Triclinic-pinacoidal bluish violet crystals of henmilite, on milky white olshanskyite spheres. Collection and photo of Gianfranco Ciccolini. Nikon D610, bellows, Schneider Kreuznach 28mm; f:4. Focal using 5.6.

Henmilite is a rare copper borate species. This specimen from modern finds at this small mine, about 10 years ago (~2001) features sharp crystals.

© Rob Lavinsky & irocks.com

A specimen of Henmilite crystals on matrix. C. Stefano specimen #2551.

© C. Stefano '12

The microstructure of stannoidite mineralization from Konjo mine, type locality! Polygonal granular, porous aggregate of stannoidite (pinkish-brown to brown-grey reflectance pleochroism), with inclusions of chalcopyrite (yellow), surrounded by sphalerite (grey). Vertically reflected, plane polarized light, digital image in air. Vintage ...

© Günter Grundmann, Detmold

Henmilite crystal on matrix. Doug Merson photo and collection.

© 2/2017 Douglas Merson

The microstructure of stannoidite mineralization, type locality! Polygonal granular, porous aggregate of stannoidite (extremely colorfull anisotropy, blue, orange, greenish grey, red to brown rotation tints), in association with chalcopyrite (weak olive brown to bluish anisotropy), surrounded by sphalerite (isotropic). Vertically reflected, ...

© Günter Grundmann, Detmold

A rather big specimen of Henmilite. Biggest crystal is roughly 5mm with several others over 3mm. The interesting thing is that a big chunk formed by clusters of Henmilite micro-crystals lays under the white layer of calcite and other boron minerals. Also, needle like crystals of transparent colorless calcite crystals present in the cracks of the ...

© Iris Collection Xinyue Ma

A 1 cm aggregate of prismatic, beige crystals of Baghdadite in the center of the photo with a black crystal of Perovskite to the right in a matrix of greiysh-white calcite from the Fuka mine, Okayama, Japan. Specimen and photo: Knut Eldjarn.

© Knut Eldjarn

Unusually bright coloured purple-violet massive spurrite skarn. Associating minerals are brownish-grey corroded gehlenite grains, secondary white Ca-silicates, abundant but small grains of reddish-brown perovskite. Specimen size is 5x2.5x2 cm. Collected by Igor V. Pekov in 2007 on the Western outcrop of the locality. Pavel M. Kartashov collection ...

© Pavel M. Kartashov collection & photo

Green inclusions of Numanoite in a 2 mm crystal of Borcarite from the Fuka mine, Japan. Specimen and photo: Knut Eldjarn.

© Knut Eldjarn

Polished section in reflected light. Large brownish-grey grain of cracked Nukundamite intergrow with light-yellow Chalcopyrite and replaced by grey Hematite along crakes. Nukundamite is in cavity and overgrow purplish Mawsonite-Stannoidite aggregate grow over Quartz druze (grey at the top). For size of the FOV look daughter photo and for ...

© Pavel M. Kartashov collection & photo

Polished section in reflected light. More greyish central part of rounded grain composed by Stannoidite, outer more orange part composed by Mawsonite. Yellow sulphide is Chalcopyrite. The most outer part of Mawsonite zone is somewhere covered by very thin interrupting layer of ferroan Tennantite of greenish-grey colour. Vein mineral at the right ...

© Pavel M. Kartashov collection & photo

2 mm size crystal of pentahydroborite. Fragment of pentahydroborite crust of 3x2x0.8 cm size. IRS diagnostic. Pavel M. Kartashov collection and photo.

© Pavel M. Kartashov collection & photo

Triclinic crystal of henmilite showing deep purple color typical of this mineral. Brent Thorne specimen and photograph.

© Brent Thorne

Henmilite is a beautiful copper borate species with vibrant purple color, and this find to me still remains one of the great discoveries of the past decade in terms of relevance to the collector of beautiful rarities. This is an oustanding specimen from a major find of about 4 years ago, at an old classic locality where this species had first been ...

© Rob Lavinsky & irocks.com

Gemmy, deep blue crystals of the very rare copper borate henmillite nicely lined up on contrasting white matrix, which includes another ultra-rare calcium borate, olshanskyite. Henmillite of such quality is found only at the Fuka Mine on Honshu Island, Japan.

© Rob Lavinsky & irocks.com

Sharp, lustrous, discrete, deep blue henmilite crystals are richly and nicely scattered on contrasting, layered, botryoidal, tan drusy calcite matrix on this one-of-a-kind specimen from the Type Locality - the Fuka Mine, Honshu Island, Japan. Henmilite is an ULTRA-RARE copper borate, found ONLY at the Fuka Mine.

© Rob Lavinsky & irocks.com

Henmilite with unknown light blue mineral. Olympus E-5 / tube / Zuiko Auto-Macro 38mm.

© Yaiba Sakaguchi

Cobalt blue crystals of henmilite with white olshanskyite on calcite, from the collection of David J. Eicher. Crystal Classics specimen.

© David J. Eicher

Nice sharp henmilite crystals surrounded by another unknown light blue mineral species. Specimen and Photograph A. Tuma, N-D60.105m

© Andrew Tuma

Light pink zircon crystals picked out of stream sand weathered out of jadeite-bearing rodingites on Ohsayama. As these zircons were derived ultimately from gabbros or serpentinites, they probably contain little uranium and thorium compared to the zircons from the more usual granitic source rocks. fov 4.5cm

© Alfredo Petrov

Deep blue Henmilite crystals, up to 3 mm in size and colourless Pentahydroborite hosted by a calcite matrix. Small crystals of Charlesite, not analyzed, up to 0.8 mm in size, with a light-pink colour, can be seen at the bottom of the specimen. NP Collection and photograph.

© Nicu Pascanu

Henmilite is an exceptionally rare and very beautiful calcium copper boro-hydroxide found at the Fuka mine in Japan, the type and only locality for the species. This piece is arguably the best thumbnail specimen and possibly the most aesthetic example of the species that we have seen available. This little jewel has well over a dozen, well-formed, ...

© Rob Lavinsky & irocks.com

The black-dark green coloration around the Rutile (dark brown) is Amaterasuite. The pink area is Tausonite. SEM-EDS analysis.

Part of a henmilite crystal.

© Erin Lydon

Dark ink blue crystal of henmilite (a calcium-copper borate) on calc-silicate skarn. From the type and currently only known locality. Collection and photo: Sun Yi.

© Sun Yi

The color of the photo has been corrected to achieve the effect closest to what can be seen with the naked eye.

© Tsang Ho Yin

Henmilite crystal with surface tarnishing.

© Zach Berghorst

Fukalite from Fuka mine, Takahashi, Japan Sample 14 mm

© hamster@aon.at

Dark-brown morimotoite grains into calcite-wollastonite skarn from the type locality. Appearance of the mineral is really different from usual schorlomite. Confirmed by microprobe and XRD analyses. Collected by Igor V. Pekov in 2007 under supervising of the specie author from the same point of the outcrop as and holotype specimen. Pavel M. ...

© Pavel M. Kartashov collection & photo

Alfredo Petrov specimen - Tucson 2008

© J.Ralph 2008

Bicchulite, intermixed with hydrogrossular, as pseudomorphs after gehlenite crystals, to 0.8 cm. S355-18 Alfredo Petrov specimen.

© 2008, JGW

A polished slab showing white veinlets of stronalsite in pale green massive jadeite. S293-22 6 cm field of view. Excalibur Mineral Company specimen.

© 2008, JGW

Polished section in reflected unpolarized light. Lovely colourful association of copper sulphides in quartz matrix. Spotty purplish-pink bornite contains yellow chalcopyrite laths and inclusions and is surrounded by greenish-grey Zn- and Sb-free tennantite. A blue covellite is the king of this association. Modest grey small grains of cassiterite ...

© Pavel M. Kartashov collection & photo

Slender colorless transparent crystal of protoanthophyllite in matrix. S415-057 N2192N Specimen obtained from Alfredo Petrov.

© 2008, JGW

0.4 cm massive. S224-23 Excalibur Mineral Company specimen.

© 2008, JGW

1.6cm crystal with clear tip. Thin tabular.

© Alfredo Petrov

Size: 11x8x5 mm

© Sergey Vasiliev

A massive shimazakiite lump from #4 adit, Fuka mine. This specimen was collected by Prof. H. Shimazaki in 2011. 5.5 cm long. Nikon Micro Nikkor 60mm F2.8G ED/Nikon D3

© R. Tanaka

8.5 x 7.3 x 3.9 cm. Bicchulite is a very rare calcium silicate and this very rich and showy specimen is from the Type Locality - the Fuka Mine of Japan. Sharp, gray, rectangular crystals to 4 mm of bicchulite pseudomorphs after gehlenite crystals richly cover the matrix on this specimen. Gehlenite is also a very rare calcium silicate. The Fuka ...

© Rob Lavinsky & irocks.com

Henmilite from Fuka Mine, Japan FOV is about 4 mm

© Robert Simonoff, 2012

A small, 0.01 cm, grain of baghdadite, fluorescing in response to SW-UV illumination. Child photo is the same with visible light. S405-028F Excalibur Mineral specimen.

© 2008, JGW

Very light coloured brownish-orange reedmergnerite-like lamellar agregate of primary nifontovite replacing by white fine-grained veinlets and crusts of secondary Ca-borates. Specimen size is 3.5x2x1.2 cm. Pavel M. Kartashov collection and photo.

© Pavel M. Kartashov collection & photo

Very fresh, transparent light-grey large monograin of tilleyite in skarn. Associating minerals are greenish vesuvianite and beige wollastonite. Specimen size is 5x2 cm. Collected by Igor V. Pekov in 2007 on the Northern outcrop of the locality. Pavel M. Kartashov collection and photo.

© Pavel M. Kartashov collection & photo