Browse Private Gallery

Explore museum-quality mineral specimens from around the world. Each piece has been carefully selected by Grant Powell for its exceptional beauty, rarity, and scientific significance.

36 specimens
Hematite-Included Quartz – Lustrous Brick-Red Multi-Generational Crystal Cluster

Quartz

Hematite-Included Quartz – Lustrous Brick-Red Multi-Generational Crystal Cluster

Izizauen, Alnif, Tarhbalt, Tinghir Province, Drâa-...

Carrollite – Exceptional Single-Crystal – Mirror-Luster Octahedral Form with Sculptural Perfection

Carrollite

Carrollite – Exceptional Single-Crystal – Mirror-Luster Octahedral Form with Sculptural Perfection

Kamoya South II Mine, Kamoya, Kambove, Kambove Ter...

Red Zircon on Matrix

Zircon

Red Zircon on Matrix

Shigar Valley, Shigar District, Gilgit-Baltistan, ...

Red Zircon on Matrix

Zircon

Red Zircon on Matrix

Shigar Valley, Shigar District, Gilgit-Baltistan, ...

Red Zircon on Matrix

Zircon

Red Zircon on Matrix

Shigar Valley, Shigar District, Gilgit-Baltistan, ...

Fluorite - Green, Clear Cube Conglomerate

Fluorite

Fluorite - Green, Clear Cube Conglomerate

Xianghualing Mine, Xianghualing Sn-polymetallic or...

Halite – Monumental, Museum-Scale Cubic Crystals with Exceptional Ice-Clear Transparency,

Halite

Halite – Monumental, Museum-Scale Cubic Crystals with Exceptional Ice-Clear Transparency,

Wieliczka Mine, Wieliczka County, Lesser Poland Vo...

Faden Quartz – Elongated Skeletal Crystal with Pronounced Central Faden Line and Stepped Growth

Quartz

Faden Quartz – Elongated Skeletal Crystal with Pronounced Central Faden Line and Stepped Growth

Dera Ismail Khan District, Khyber Pakhtunkhwa Prov...

Baryte – Historic Hematite-Included Bladed Crystals with Red Zoning, 1800's Frizington Classic

Barite

Baryte – Historic Hematite-Included Bladed Crystals with Red Zoning, 1800's Frizington Classic

Frizington, Arlecdon and Frizington, Copeland, Cum...

Crocoite – Fiery Red-Orange Radiating Acicular Crystal Aggregate, Classic Dundas

Crocoite

Crocoite – Fiery Red-Orange Radiating Acicular Crystal Aggregate, Classic Dundas

Dundas, Zeehan District, Tasmania, Australia

Schorl Tourmaline – Sculptural Parallel Growth Cluster with Precision Striations, Dara-e-Pech Cabinet Piece

Tourmaline (Schorl)

Schorl Tourmaline – Sculptural Parallel Growth Cluster with Precision Striations, Dara-e-Pech Cabinet Piece

Dara-e-Pech Pegmatite Field, Dara-e-Pech District,...

Elbaite Tourmaline – Slender Bi-Color Prism with Pale Cap and Razor Termination, Dara-e-Pech Classic

Tourmaline (Elbaite)

Elbaite Tourmaline – Slender Bi-Color Prism with Pale Cap and Razor Termination, Dara-e-Pech Classic

Dara-e-Pech Pegmatite Field, Dara-e-Pech District,...

Rose Quartz on Albite – Exceptional Large, Single, Doubly-Terminated Crystal

Quartz (Rose)

Rose Quartz on Albite – Exceptional Large, Single, Doubly-Terminated Crystal

Taquaral, Itinga, Minas Gerais, Brazil

Elbaite Tourmaline – Lemon Pocket, Gem Crystal with Rare Yellow Zoning

Tourmaline (Elbaite)

Elbaite Tourmaline – Lemon Pocket, Gem Crystal with Rare Yellow Zoning

Coronel Murta, Minas Gerais, Brazil

Baryte – Exceptional Gem-Clear Double-Terminated Honey Crystal on Matrix

Barite

Baryte – Exceptional Gem-Clear Double-Terminated Honey Crystal on Matrix

Linwood Mine, Buffalo, Scott County, Iowa, USA

Barite – Gem-Clear Honey-Colored Tabular Crystal Cluster

Barite

Barite – Gem-Clear Honey-Colored Tabular Crystal Cluster

Linwood Mine, Buffalo, Scott County, Iowa, USA

Marcasite Crystal Stalactite – Rare Radiating Marcasite Formation with Golden Twin Termination

Pyrite

Marcasite Crystal Stalactite – Rare Radiating Marcasite Formation with Golden Twin Termination

Linwood Mine, Buffalo, Scott County, Iowa, USA

Gem Sphalerite on Matrix – Lustrous Honey-Brown Sphalerite Crystal Cluster

Sphalerite

Gem Sphalerite on Matrix – Lustrous Honey-Brown Sphalerite Crystal Cluster

Krushev Dol Mine, Madan Ore Field, Smolyan Provinc...

Iridescent Chalcopyrite on White Matrix – Brilliant Peacock-Luster Chalcopyrite Crystal Cluster

Chalcopyrite

Iridescent Chalcopyrite on White Matrix – Brilliant Peacock-Luster Chalcopyrite Crystal Cluster

Baisha Copper Mine, Hunan Province, China

Almandine Garnet on Materix – Lustrous Deep Red Dodecahedral Crystal

Garnet (Almandine)

Almandine Garnet on Materix – Lustrous Deep Red Dodecahedral Crystal

Tyrol Region, Austria

Nifontovite – Exceptional Gem-Clear Elongated Prismatic Crystal

Nifontovite

Nifontovite – Exceptional Gem-Clear Elongated Prismatic Crystal

Charcas Mining District, Charcas, San Luis Potosí,...

Calcite - Gem-Quality, Double-Terminated, Amber Scalenohedron from Elmwood

Calcite

Calcite - Gem-Quality, Double-Terminated, Amber Scalenohedron from Elmwood

Elmwood Mine, Carthage, Smith County, Tennessee, U...

Fluorite – Monumental Water-Clear Cubic Cluster

Fluorite

Fluorite – Monumental Water-Clear Cubic Cluster

China

Phlogopite (Mica) – Gem Green Crystal on White Dolomitic Marble

Phlogopite (Mica)

Phlogopite (Mica) – Gem Green Crystal on White Dolomitic Marble

Cassiterite - World-Class Translucent Twin, Sculptural Masterpiece

Cassiterite

Cassiterite - World-Class Translucent Twin, Sculptural Masterpiece

Amo Tin (Sn) Deposit, Ximeng County, Yunnan Provin...

Chalcopyrite – Electric Peacock Iridescence, Sculptural Botryoidal Form

Chalcopyrite

Chalcopyrite – Electric Peacock Iridescence, Sculptural Botryoidal Form

Tongshankou Mine, Daye Co., Huangshi, Hubei Provin...

Zincite - Cathedral of Fire, Monumental Crimson Spire Cluster

Zincite

Zincite - Cathedral of Fire, Monumental Crimson Spire Cluster

Zinc Smelting District, Silesian Voivodeship, Pola...

Quartz Gwindel - Museum Grade, Exceptionally Rare Locale (Brazil)

Quartz

Quartz Gwindel - Museum Grade, Exceptionally Rare Locale (Brazil)

Serra da Mangabeira, Paramirim, Bahia, Brazil (Dir...

Quartz - Radiant Scepter of Sculptural Needle Cluster

Quartz

Quartz - Radiant Scepter of Sculptural Needle Cluster

Santander Department, Colombia

Pyrite - Large, Lustrous, Dodecahedral Specimen

Pyrite

Pyrite - Large, Lustrous, Dodecahedral Specimen

Huanzala Mine, Peru

Creedite - Radiating Peach Crystals

Creedite

Creedite - Radiating Peach Crystals

Navidad Mine, Indé Municipality, Durango, Mexico

Fluorite - Gem-Clear Pale Green Cluster

Fluorite

Fluorite - Gem-Clear Pale Green Cluster

Xia Huang Pu Mine, Chenzhou Prefecture, Hunan Prov...

Pink Calcite - Gem-Zoned, Manganese-Bearing Classic

Calcite

Pink Calcite - Gem-Zoned, Manganese-Bearing Classic

Empire State Zinc Mine (Balmat District), New York...

Celestine on Golden Calcite - Perfect Termination, Color and Form

Celestine / Celestite

Celestine on Golden Calcite - Perfect Termination, Color and Form

Dara-i-Laman, Badghis Province, Afghanistan

Viitaniemiite - Large, Well-Formed Crystal

Viitaniemiite

Viitaniemiite - Large, Well-Formed Crystal

Chhappu, Braldu Valley, Shigar District, Gilgit-Ba...

Achroite Tourmaline - Near-Colorless - Exceptional Stacked Crystal Group

Tourmaline (Elbaite)

Achroite Tourmaline - Near-Colorless - Exceptional Stacked Crystal Group

Chhappu, Braldu Valley, Shigar District, Gilgit-Ba...