Mineral Classics

Mineral Classics The company founder, Richard A. Kosnar, was a world renowned mineral collector and dealer. In 1993, a new mineral species, KOSNARITE, from Mt.

est. 1970, we are committed to providing quality mineral specimens, native elements, gemstones and gem crystals to collectors, museums and anyone interested in the hobby Mineral Classics, est. 1970 and located in Colorado, is a family owned company dedicated to supplying excellent quality mineral specimens to collectors, museums and anyone interested in the science and hobby of mineralogy. Mica, Auburn, Maine was named in his honor for his contribution to the mineralogical community. We are extremely proud to have a mineral bearing the family name. (Ref: American Mineralogist, Vol. 78, No. 5 & 6, pgs. 653-656, May/June 1993). Richard Kosnar is listed in The International Directory of Distinguished Leadership published by the American Biographical Institute, 1992. Sadly, Richard passed away on January 15, 2007. He was incredibly strong, both mentally and physically and fought for many years with his health issues, but his love for minerals was never compromised. Even in the days leading to his death, Richard continued to expand his mineral collection, and studied the minerals that had composed his life's work. Today, Mineral Classics continues the procuring, mining, importing, and sale of fine quality mineral specimens, gemstones, and jewelry. We have always strived to provide not just popular mineral species, but a wide selection of unique and hard to find minerals from classic and contemporary localities. Richard’s son, Brian Kosnar, is now running the company and is following in his fathers’ footsteps traveling to mineral localities in pursuit of specimens. His wife, Angela, works with him photographing the minerals for the website and publication, along with countless other duties for which she never receives enough credit. In 2011 Brian’s son, William, was named the youngest mineral dealer at the Denver Gem and Mineral Show at 10 years old and continues to sell specimens alongside his parents at the various shows around the world. Brian’s brother, Brett Kosnar, and his wife Allyce facet gemstones and create custom jewelry. Their material can be found at www.kosnargemco.com

The best discoveries are often the ones you weren’t expecting to find.Mineral Classics will be at Hardrock Summit from S...
09/08/2026

The best discoveries are often the ones you weren’t expecting to find.

Mineral Classics will be at Hardrock Summit from September 10 – 13, at booth HS450. Stop by to explore remarkable mineral specimens, examine the details that matter to collectors, ask questions, and discover something new! ✨

📍10600 Westminster Blvd, Westminster, CO 80020 (The Westin Hotel Westminster)

Make booth HS450 part of your Hardrock Summit plans!

What’s at the top of your list right now? 🔎A specific mineral? A locality you have been searching for? A new specimen th...
09/07/2026

What’s at the top of your list right now? 🔎

A specific mineral? A locality you have been searching for? A new specimen that immediately grabs attention? Or are you just browsing? No matter what the answer is, COME SEE US!!

We are at the Just Minerals & Crystals event beginning today!

Event Dates: September 7–12
Event Times: Monday–Friday: 10am – 6pm
Saturday: 10am – 4pm

📍 DoubleTree by Hilton Hotel Thornton
83 East 120th Avenue, Thornton, Colorado

Come say hello and let’s have some great conversations!

Some discoveries change what collectors believe a mineral species can produce.At this year’s Hardrock Summit, we will be...
09/06/2026

Some discoveries change what collectors believe a mineral species can produce.

At this year’s Hardrock Summit, we will be showcasing an extraordinary group of faceted Mimetite gems from a small 2024 discovery at the Yanga Koubenza Mine in the Republic of the Congo (Brazzaville)!

Transparent, facetable Mimetite is exceedingly rare. For approximately fifty years, the celebrated Tsumeb material remained the only renowned source of Mimetite suitable for cutting. The Congo discovery is different: remarkable transparency paired with a saturated golden-yellow color far richer than the soft, straw-colored Tsumeb stones.

Mineral Classics had exclusive access to the rough, and every gemstone produced from it was faceted by our very own & amazing Will Kosnar!

Come see this exceptional material with us at the Hardrock Summit, September 10–13, at Booth HS450!

📍The Westin Hotel Westminster (10600 Westminster Blvd, Westminster, CO 80020)

Tomorrow is opening day at the Just Minerals & Crystals event, and we’re so excited to be back!. 💎Bring your wishlist, y...
09/06/2026

Tomorrow is opening day at the Just Minerals & Crystals event, and we’re so excited to be back!. 💎

Bring your wishlist, your questions, or simply your curiosity. For newer collectors, a show can be a valuable way to develop your eye and learn which details matter most to you. For experienced collectors, this is an opportunity to search with intention and perhaps find the piece a collection has been missing!

Don’t be shy, come see us! 🫶

Dates: September 7–12
Times: Monday–Friday: 10am – 6pm
Saturday: 10am – 4pm

📍83 East 120th Avenue
Thornton, Colorado (DoubleTree by Hilton Hotel Thornton)

There are two places to find Mineral Classics at the Hardrock Summit this year!💎Visit us at booth HS450, and find Will K...
09/05/2026

There are two places to find Mineral Classics at the Hardrock Summit this year!💎

Visit us at booth HS450, and find Will Kosnar in the DGMS room!

📅September 10 – 13

📍The Westin Hotel Westminster (10600 Westminster Blvd
Westminster, CO 80020)

⏰Thursday–Saturday: 10am–5pm
Sunday: 10am – 3pm

Save the show details and our booth number before you arrive. We look forward to seeing you in Westminster!

Some specimens only fully reveal their beauty in person—their scale, crystal form, color, and luster all become part of ...
09/03/2026

Some specimens only fully reveal their beauty in person—their scale, crystal form, color, and luster all become part of the experience ✨

We are packing up to head to Colorado for the Just Minerals & Crystals event, September 7–12. Whether you’re an experienced collector or just beginning to explore the mineral & gem world, come discover remarkable natural forms and see what captures your attention up close!

📍83 East 120th Avenue, Thornton, Colorado (DoubleTree by Hilton Hotel Thornton)

Explore the show’s website and plan your visit to come see us at justmineralshow.com!

The September show season is here, and Mineral Classics will be attending two events in Colorado!Just Minerals & Crystal...
09/01/2026

The September show season is here, and Mineral Classics will be attending two events in Colorado!

Just Minerals & Crystals
📅September 7 – 12
📍83 East 120th Avenue, Thornton, Colorado (DoubleTree by Hilton Hotel Thornton)
⏰Monday–Friday: 10am – 6pm
Saturday: 10am – 4pm

Hardrock Summit
📅September 10 – 13
📍10600 Westminster Blvd, Westminster, CO 80020 (The Westin Hotel Westminster)
⏰Thursday–Saturday: 10am – 5pm
Sunday: 10am – 3pm

At Hardrock Summit, visit us at booth HS450 and find Will Kosnar in the DGMS room!

Save the dates—we look forward to seeing all of you in Colorado this month!

Knappenwand Epidote has a reputation that few localities can match; this specimen shows why. Dozens of sharp, lustrous, ...
08/28/2026

Knappenwand Epidote has a reputation that few localities can match; this specimen shows why.

Dozens of sharp, lustrous, rich green prismatic crystals grow in a diverging formation, with one larger crystal showing a slightly bent or curved habit that is rarely seen from the locality. Many Knappenwand specimens appear so dark that the color is difficult to appreciate, but here the crystals are thin enough for the green to come through beautifully with backlighting.

The pleochroism adds another layer of interest, shifting from green to golden-brown as the crystals are rotated. From the Kay Robertson collection, this is a strong display piece from one of the most celebrated Epidote localities in the world.

Learn more about this gorgeous piece on our website!

Locality: Knappenwand, Untersulzbachtal, Hohe Tauern, Salzburg, Austria

This Calcite is a strong example of why lesser-known localities can be so interesting to collectors.From the Copper Rive...
08/26/2026

This Calcite is a strong example of why lesser-known localities can be so interesting to collectors.

From the Copper Rivet Mine in Colorado, this specimen features a sharp 4.2 cm Calcite scalenohedron from a locality that is not often represented on the market. Copper Rivet specimens are already uncommon, and many are not especially displayable, which makes this well-crystallized example stand out even more.

The minor green Malachite and blue Azurite associations add a subtle but important touch, connecting the piece back to the copper-rich character of the locality. For collectors of Colorado minerals, obscure mining districts, or well-formed Calcite crystals from unusual sources, this is a piece with both visual and locality appeal.

This specimen is now available on our website!

Locality: Copper Rivet Mine, Mesa County, Colorado

Few pseudomorphs tell a story quite like the Copper Roses from New Mexico.This specimen has a more open, sculptural form...
08/24/2026

Few pseudomorphs tell a story quite like the Copper Roses from New Mexico.

This specimen has a more open, sculptural form than many examples from the locality, with sharp blades flaring outward like a broad blossom rather than a tightly formed rose. The surface is almost completely coated in mint green Malachite, with small areas of drusy off-white Calcite on the reverse and a light blue mineral that may be Turquoise or Chrysocolla.

What makes these Copper Rose specimens so extraordinary is the replacement process behind them. Native Copper altered into crystallized Azurite rosettes, then was later replaced again by Native Copper, essentially returning the specimen to its original metal in a completely new form.

It is a striking example of mineral transformation, with the shape of one mineral preserved through the chemistry of another.

View this specimen and more classic pseudomorphs at MinClassics.com!

Locality: Copper Rose Mine (Rose Mine; McGregor Mine; Copper Glance Mine; Potosi Mine), San Lorenzo, Georgetown Mining District, Grant County, New Mexico

Address

3799 Las Vegas Blvd S
Las Vegas, NV
89109

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