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
Hyalite Opal - Clear Crystals Exuding Exception Green Under UV

Opal

Hyalite Opal - Clear Crystals Exuding Exception Green Under UV

Kopasz Hill, Tarcal, Zemplén Mountains, Hungary

Wulfenite - Superb Orange Gem Large Crystal On Matrix

Wulfenite

Wulfenite - Superb Orange Gem Large Crystal On Matrix

Erupción Mine, Los Lamentos, Municipality of Ahuma...

Fluorite - Gem Flawless Green Cube on Gray Matrix

Fluorite

Fluorite - Gem Flawless Green Cube on Gray Matrix

Xianghualing, Hunan Province, China

Albite - Gem Crystal Plate Pristine White And Clear Terminations

Albite

Albite - Gem Crystal Plate Pristine White And Clear Terminations

Nolla Valley, Thusis, Viamala Region, Grisons, Swi...

Dolomite - Gem Crystal on Matrix With Rainbow Luster

Dolomite

Dolomite - Gem Crystal on Matrix With Rainbow Luster

Azcárate Quarry, Eugui, Esteríbar, Navarre, Spain

Dolomite with Manganese oxides (classic locale)

Dolomite

Dolomite with Manganese oxides (classic locale)

Azcárate Quarry, Eugui, Esteríbar, Navarre, Spain

Selenite - Gem Yellow Duckbill Crystals on Matrix Ball

Selenite

Selenite - Gem Yellow Duckbill Crystals on Matrix Ball

Canada

Gem Twinned Sphalerite on Calcite – Exceptional 2020 Huanggang Find

Sphalerite

Gem Twinned Sphalerite on Calcite – Exceptional 2020 Huanggang Find

Huanggang Mines, Hexigten Banner, Chifeng City, In...

Crocoite – Exceptionally Thick, Gemmy Crystal on Contrasting Matrix

Crocoite

Crocoite – Exceptionally Thick, Gemmy Crystal on Contrasting Matrix

Red Lead Mine, Dundas mineral field, Tasmania, Aus...

Twinned Calcite – Exceptional Intergrowth with Pristine Secondary Crystallization

Calcite

Twinned Calcite – Exceptional Intergrowth with Pristine Secondary Crystallization

Leiping, Guiyang County, Hunan Province, China

Quartz – Exceptional Water-Clear Focal Crystal with Anatase Inclusion

Quartz

Quartz – Exceptional Water-Clear Focal Crystal with Anatase Inclusion

Pakistan, Himalayan region

Fluorite – Gemmy Green Cubes with Vivid Purple Zoning

Fluorite

Fluorite – Gemmy Green Cubes with Vivid Purple Zoning

Zhejiang Province, China

Rhodonite – Deep Cherry-Red Lustrous Crystal on Matrix

Rhodonite

Rhodonite – Deep Cherry-Red Lustrous Crystal on Matrix

Morro da Mina Mine, Conselheiro Lafaiete, Minas Ge...

Green Apophyllite – Vivid Gemmy Flower Cluster in Vug Matrix

Apophyllite

Green Apophyllite – Vivid Gemmy Flower Cluster in Vug Matrix

Deccan Traps, Maharashtra State, India

Amethyst on Matrix - Nearly Flawless Deep Purple Crystals with Glossy Luster

Quartz (Amethyst)

Amethyst on Matrix - Nearly Flawless Deep Purple Crystals with Glossy Luster

Veracruz, Mexico

Tourmaline - Natural Watermelon Multicolor Crystal with Pristine Termination

Tourmaline (Elbaite)

Tourmaline - Natural Watermelon Multicolor Crystal with Pristine Termination

Paprok, Kamdesh District, Nuristan Province, Afgha...

Goshenite on Matrix - Rare Vertical Hexagonal Gemmy White Beryl Crystals

Aquamarine (Beryl)

Goshenite on Matrix - Rare Vertical Hexagonal Gemmy White Beryl Crystals

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

Rhodonite - Cherry Red Focal Crystal on Matrix, Structurally Fine Locality Specimen

Rhodonite

Rhodonite - Cherry Red Focal Crystal on Matrix, Structurally Fine Locality Specimen

Morro da Mina Mine, Conselheiro Lafaiete, Minas Ge...

Baryte - Large Gemmy Golden Crystal on Matrix with Exceptional Luster

Barite

Baryte - Large Gemmy Golden Crystal on Matrix with Exceptional Luster

Linwood Mine, Buffalo, Scott County, Iowa, USA

Fluorite - Exceptional Glass-Clear Colorless Triplet Crystal Cluster

Fluorite

Fluorite - Exceptional Glass-Clear Colorless Triplet Crystal Cluster

Dal’negorsk, Primorsky Krai, Russia

Aragonite – Vivid Sky-Blue Botryoidal Plate with Smooth Satiny Luster

Aragonite

Aragonite – Vivid Sky-Blue Botryoidal Plate with Smooth Satiny Luster

Yunnan Province, China

Quartz – Flawlessly Clear Bright Lustrous Centered Crystal on Aesthetic Matrix

Quartz

Quartz – Flawlessly Clear Bright Lustrous Centered Crystal on Aesthetic Matrix

India

Baryte – Complete Double-Terminated Floater with Exceptional Gemminess and Natural Etching

Barite

Baryte – Complete Double-Terminated Floater with Exceptional Gemminess and Natural Etching

Linwood Mine, Buffalo, Scott County, Iowa, USA

Baryte – Exceptionally Gemmy Naturally Etched Crystal from the 2025 Portal Pocket

Barite

Baryte – Exceptionally Gemmy Naturally Etched Crystal from the 2025 Portal Pocket

Linwood Mine, Buffalo, Scott County, Iowa, USA

Halite on Matrix with Sylvite – Deep Blue Perfect Cube Elegantly Perched on Contrasting Matrix

Halite

Halite on Matrix with Sylvite – Deep Blue Perfect Cube Elegantly Perched on Contrasting Matrix

Potash Mines, Carlsbad, Eddy County, New Mexico, U...

Axinite – Large Clove-Brown Bladed Crystal Plate on Custom Acrylic Base

Axinite

Axinite – Large Clove-Brown Bladed Crystal Plate on Custom Acrylic Base

Raipa Mine, Aija Province, Ancash Department, Peru

Gypsum var. Selenite – Monumental Gemmy Sword Crystal Cluster with Elongated Transparent Blades

Selenite

Gypsum var. Selenite – Monumental Gemmy Sword Crystal Cluster with Elongated Transparent Blades

Wenshan, Yunnan Province, China

Crocoite on Hematite – Large Translucent Red-Orange Terminated Crystal on Botryoidal Metallic Matrix

Crocoite

Crocoite on Hematite – Large Translucent Red-Orange Terminated Crystal on Botryoidal Metallic Matrix

Dundas, Tasmania, Australia

Calcite – Monumental Nail-Head Crystal Cluster with Sharp Undamaged Terminations and Custom Acrylic Base

Calcite

Calcite – Monumental Nail-Head Crystal Cluster with Sharp Undamaged Terminations and Custom Acrylic Base

Wenshan Mine, Wenshan City, Wenshan, Yunnan, China

Quartz var. Mango Quartz with Halloysite – Intricate Lustrous Needle Cluster with Saturated Orange-Yellow Terminations

Quartz (Mango/Halloysite)

Quartz var. Mango Quartz with Halloysite – Intricate Lustrous Needle Cluster with Saturated Orange-Yellow Terminations

Boyacá Department, Colombia

Celestine – Sky-Blue Geode Cluster with Gemmy Prismatic Crystals and Saturated Blue Terminations

Celestine / Celestite

Celestine – Sky-Blue Geode Cluster with Gemmy Prismatic Crystals and Saturated Blue Terminations

Sankoany, Ketsepy, Mahajanga Province, Madagascar

Epidote – Lustrous Forest-Green Crystal Cluster with Sharp Terminations and Gemmy Yellow-Green Highlights

Epidote

Epidote – Lustrous Forest-Green Crystal Cluster with Sharp Terminations and Gemmy Yellow-Green Highlights

Kharan District, Balochistan Province, Pakistan

Titanite with Actinolite on Calcite – Gem Honey-Golden Twin Crystal on Matrix

Titanite

Titanite with Actinolite on Calcite – Gem Honey-Golden Twin Crystal on Matrix

Mulla Ghori, Khyber District, Khyber Pakhtunkhwa, ...

Gypsum var. Selenite - Gem with Red Matrix Inclusions

Selenite

Gypsum var. Selenite - Gem with Red Matrix Inclusions

Bermejillo, Durango, México

Calcite with Pyrolusite Inclusions – Gem-Clear Prismatic Crystals with Dramatic Black Internal Landscapes

Calcite

Calcite with Pyrolusite Inclusions – Gem-Clear Prismatic Crystals with Dramatic Black Internal Landscapes

Yongkang, Jinhua Prefecture, Zhejiang Province, Ch...

Apophyllite – Sparkling Gemmy Druzy Plate with Sculptural White Terminated Crystals

Apophyllite

Apophyllite – Sparkling Gemmy Druzy Plate with Sculptural White Terminated Crystals

Maharashtra, India