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Fine Minerals International

Fine Minerals International The duo owns mines and sources minerals from destinations around the globe including Brazil, China, Pakistan, Tanzania and Colombia.
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After 20 years of sourcing and selling beautiful, top quality minerals, Fine Minerals International owners Daniel Trinchillo and Marisa Chung have become highly regarded as the most experienced pair in the international mineral market. With reputations built on passion and personal relationships with top collectors, they maintain the highest standards for quality and honesty. Access to this one-of

-a-kind collection has previously only been available to elite private collectors. Daniel and Marisa now bring their international expertise to New York where buyers will have the opportunity to educate themselves on the background, aesthetic appeal, and value of minerals. Amethyst, Quartz, Tourmaline and Aquamarine are just some of the many minerals on display for those interested in using minerals as artistic expression. We are excited to share the awe and beauty of nature’s art.

06/11/2025

ID #: 08570, Hematite & Adularia
St Gotthard pass area, Central St Gotthard Massif, Leventina, Ticino, Switzerland

"Eisenroses," also known as "iron roses," are striking, naturally occurring hematite formations that resemble roses. They are composed of thin, tabular, metallic-gray hematite crystals that have formed stacked atop one another in a slightly rotated composition, giving them their unique appearance. They typically form in high-altitude, alpine environments, and the best examples are predominantly found in the Swiss Alps. Given the difficulty of alpine mining and the smaller output of these pockets, eisenroses are especially prized by collectors for their aesthetic appeal and limited availability.

The primary cluster of this example is a complete and dimensional “blossom.” It is accented by a perpendicular cluster that punctuates their intricate form. The hematite is contrasted by pearly, white, doubly terminated adularia that gives the hematite a natural pedestal and furthers the specimen’s likeness to a rose in bloom.

H: 7.8 cm W: 3.8 cm D: 3 cm Wt: 57 g

05/28/2025

ID #: 01618, Fluorite & Calcite
La Collada, La Collada Mining Area, Siero, Asturias, Spain

Asturias, a small region in the north of Spain, is one such locality. Its known for incredible fluorites that came from just a handful of its mines. Crystals are cubic and range between vivid tones of blue and purple. The specimens from La Collada, specifically, are known for deeply saturated shades of indigo, grape, and blue. Its cubes also tend to have textured, matte, beveled edges. The best examples came from the cross gallery of the mine which closed in 1977, making fine-caliber specimens from La Collada irreplaceable.

This is one such example. It is composed of a cluster of sizable, lustrous, intergrown, cubic crystals. The crystals have saturated, grape-purple outer zones, and intense, indigo-blue cores. They have excellent translucency that allows them to illuminate beautifully. They also have the tell-tale, matte, beveled edges for which the locality is known. Anchoring the presentation is a primary crystal at the ideal orientation for admiration. All of these wonderful characteristics are enhanced by the presence of a stark-white, calcite matrix (host-rock). Between its impressive size, color, and form, it’s a fantastic example from the locality and would make an excellent addition to any collection.

H: 14 cm W: 17 cm D: 16 cm Wt: 4.383 kg

05/15/2025

For a deeper dive into the world of mineral “Fakes, Forgeries, and Fabrications,” check out Daniel’s article, previously published in the .

It helps shed light on artificial, anthropogenic, and forged minerals and where and when (if ever!?) these man-manipulated specimens are appropriate in the larger mineral industry.

05/06/2025

ID #: 22670, Topaz & Bixbyite
Maynard's Mine, Thomas Range, Juab County, Utah, USA

Topaz, a silicate mineral composed of aluminum and fluorine, is best known for its clarity, luster, and relative hardness, traits that have made it a popular gemstone. It typically forms in granitic pegmatites and occurs in a range of colors—from colorless and golden to blue and pink—depending on trace element inclusions and exposure to natural radiation.

This striking specimen is a cluster of topaz crystals from Maynard’s Mine in Utah, USA. The crystals are elegantly elongated and prismatic, with sharply defined, pointed terminations. The composition is dynamic and three-dimensional, featuring doubly terminated crystals and a dramatic intersecting cross formation. The topaz is translucent with a warm sherry hue, its gem-like quality shines through inclusions of embedded sand.

Scattered across the surface are small, sharp, black cubic crystals of bixbyite, adding contrast and textural interest to the cluster. Bixbyite is a mineral closely associated with Utah and was named after mineralogist and collector Maynard Bixby, who first identified the species. With its aesthetic balance and classic mineral association, this specimen is a fine representative of its locality and would make a distinctive addition to any collection.

H: 7.5 cm W: 5.1 cm D: 4 cm Wt: 44 g

04/30/2025

ID #: 07539, Rhodochrosite & Fluorite
Sweet Home Mine, Mount Bross, Alma District, Park Co., Colorado, USA

The Sweet Home Mine in Colorado, established in 1873 for silver mining, is now best known for producing several of the most highly regarded rhodochrosite specimens in the collecting world. Its fame is thanks to its unique and beautiful aesthetics, the finest examples have exceptional luster, a gem-like rhombohedral crystal habit, and a vivid fire-engine red color. This combination of traits gives Sweet Home specimens a distinctive appearance that makes them instantly recognizable.
This specimen features dozens of sharply formed, red rhombohedral rhodochrosite crystals alongside well-developed, cubic fluorite crystals. Purple fluorite is an uncommon secondary mineral at the Sweet Home Mine, making its presence here particularly notable. The fluorite has formed evenly amongst the shining rhodochrosite crystals, allowing their form and color to remain visually prominent. Visually balanced and representative of an atypical combination, this piece is an attractive example from the legendary locality.

H: 11 cm W: 14 cm D: 5 cm Wt: 900 g

04/23/2025

ID #: 19985, Tourmaline
Masisi Mine District, Democratic Republic of Congo

Tourmaline is a boron silicate mineral that forms in a wide range of colors due to the presence of numerous trace elements. It is prized by collectors for its exceptional crystal forms, vivid hues, and natural complexity. This piece comprises two sharply terminated, lustrous, prismatic crystals. The larger crystal has a bubblegum-pink body, then a zone of deeper pink, then colorless, and terminates in a thin, mint green cap. The smaller side crystal echoes the same coloration but projects outwards from the primary crystal, reminding many of a spout. Translucent, well-formed, and colorful, this is a delightful example of its kind.

H: 6.2 cm W: 4 cm D: 2 cm Wt: 48 g

04/15/2025

ID #: 23344, Chrysocolla & Malachite
Star of Congo Mine, Katanga, Democratic Republic of Congo

Chrysocolla is a hydrated copper silicate known for its vibrant blue-green hues, often forming in association with secondary copper minerals like malachite. Fine specimens of chrysocolla are a rarity in world-class mineral collections, not due to its overall scarcity (though it is not overwhelmingly prolific) but because chrysocolla does not typically exhibit an attractive and collectible form. Although loved for its propensity for cerulean to turquoise blue color, few specimens ever approach anything close to “attractive” by the parameters of discerning mineral collectors. In fact, “wonderfully colorful but amorphous” is typically the best that one could say of most chrysocolla, leaving most finds to be relegated to lapidary work.
This striking specimen features chrysocolla and malachite in a remarkable display of color, texture, and form. Measuring an impressive 28 cm across, it has rich, cerulean blue chrysocolla that has formed in sculptural botryoidal aggregates that rise and fall like an alien landscape. Tiny aggregates top the piece, adding another element of texture. Green malachite can be seen peeking through along its edges, adding visual contrast. With its unusual silhouette, rich color saturation, and size, it is a striking example of the species.

Dimensions: H: 18 cm W: 28 cm D: 12 cm Wt: 7.05 kg

04/07/2025

ID #: 17097, Tourmaline & Quartz
Santa Rosa Mine, Itambacuri, Minas Gerais, Southeast Region, Brazil

This exquisite specimen is composed of two slender tourmaline crystals that are beautifully formed and richly saturated. They exhibit deep forest green at their base and shift to blue-green towards their pointed terminations. The wand-like crystals intersect eachother, pointing in opposing directions in a bold, attractive, x-shaped composition. Striking yet elegant, the “x” is balanced upon a radial burst of colorless quartz crystals, many of which are astoundingly doubly terminated. The translucent, star-shaped matrix provides a great contrast of shapes and color to the vibrant tourmaline crystals in this sculptural specimen.

H: 9.8 cm W: 6 cm D: 4 cm Wt: 63 g

01/21/2025

ID #: 11091, Smoky Quartz & Fluorite
Zinggenstock, Grimsel Pass, Grimsel Area, Hasli Valley, Bern, Switzerland

Of the many colors fluorite might exhibit, pink examples are among the least commonly found. Crystals with even coloration and distinctly pink hues are considered a rarity and the best examples are almost exclusively found in alpine localities. To find and recover them, “cristalliers” (French) or “strahlers” (Swiss) ascend the mountainous regions each year in hopes they are lucky enough to find fine minerals which may include smoky quartz, hematite and, of course, the rare delight—pink fluorites.

This lovely specimen consists of a prismatic, vitreous smoky quartz crystal and a pink, octahedral crystal sidecar. With their warm hues and the fluorite's gentle lean nearly parallel to the broad termination face of the smoky quartz, they form a perfectly complementary duo.

H: 8 cm W: 4.5 cm D: 3 cm Wt: 91 g

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http://MardaniFineMinerals.com/

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