'Puma' Agate Geode Patagonia, Argentina A colorful agate geode 'split', with polished faces revealing bright reds, russet, ochre grey, brown and b...

Amethyst and Banded Agate Sphere Minas Gerais, Brazil This beautiful agate sphere features a nearly triangular amethyst geode. Diameter approxima...

Amazonite on Acrylic Base The Flipside Pocket, Wild Blue Indian Claim, Park County, Colorado, USA A fine example of robust microline crystal with...

Amethyst Artigas, Uruguay Cut from the walls of a large geode, this piece possesses the finest, deep purple color for amethyst. An excellent decor...

Amethyst from Unusual Locality Amatitlán, Eduardo Neri Municipality, Guerrero, Mexico A nice cluster of sharp amethyst crystals exhibiting typical...

Two Amethyst Rose Specimens Irai, Rio Grande do Sul, Brazil This is a beautiful pair of fine, lustrous 'amethyst flowers', as they are known, from...

Amethyst with Hematite Inclusions on Acrylic Base Eonyang Amethyst Deposit, Yangdung, Sannae-gun, Miryang City, South Gyeongsang Province, South K...

Three Amethyst Specimens These are very fine specimens one featuring a well-developed, single, sharp crystal of superb color nestled on feldspar m...

Amethyst Stalactite Artigas, Uruguay This stalactite specimen exhibits the finest, deep purple color for amethyst. Measuring approximately 9.4 x ...

Amethyst Rose 'Tree' on Wooden Base Irai, Rio Grande do Sul, Brazil This is an unusually three-dimensional, and very sculptural, example of these ...

Large Amethyst Geode with Banded Agate Border on Metal Stand Rio Grande do Sul, Brazil This fine amethyst geode with banded agate border shows goo...

Apatite in Matrix Azules Mine, Cerro de Mercado, Durango, Mexico Another Mexican classic. The yellow, gemmy fluorapatite crystals from this iron m...

Apatite on Acrylic Base Crystal Lode pegmatite, Fulford Mining District, Eagle County, Colorado, USA The Apatites from Crystal Lode pegmatite repr...

Zoisite on Acrylic Base This specimen is a fine, lustrous example of zoisite. Several colors are present in the crystal. A vivid blue variety of z...

Fluorapophyllite with Stilbite on Acrylic Base Water Well at Katrad, near Vambori, Rahuri, Ahmadnagar District, Nashik Division, Maharashtra, Indi...

Large Apophyllite with Stilbite India A very large decorative display specimen consisting of huge green apophyllite cubic crystals, intergrown wit...

Stilbite with Apophyllite Jalgaon, Maharashtra, India This is a beautiful and colorful cabinet-sized piece of pink-peach Stilbite and contrasting ...

Single Aquamarine Crystal with Muscovite on Acrylic Base Shigar Valley, Skardu, Gilgit-Baltistan, Pakistan This superlative miniature features an ...

Aquamarine Crystal on Acrylic Base A stout aquamarine crystal of pastel blue color showcasing its prismatic growth habit with hexagonal cross-sect...

Beryl var Aquamarine Shigar Valley, Skardu, Gilgit-Baltistan, Pakistan This impressive, completely transparent gem crystal of Aquamarine stands 7....

Aquamarine with Schorl and Feldspar Erongo Mountains, Erongo Region, Namibia A wonderful, showy piece with a nice balance of contrasting color, fo...

Aquamarine with Albite Shigar Valley, Skardu, Gilgit-Baltistan, Pakistan This gemmy, natural blue aquamarine is set off by a nice collar of cleave...

Aquamarine with Muscovite Measuring approximately 17 x 14 x 7 cm For further information on this lot please visit Bonhams.com For further info...

Two Aquamarine Specimens Aquamarine with Topaz on Acrylic Base, with a label, Erongo Mountains, Erongo, Namibia, measuring approximately 3.7 x 3.4...

Aragonite Cave Stalactite Chihuahua, Mexico The sculptural qualities of this popcorn-like cluster of stalactitic aragonite are undeniable. This is...

Blue Aragonite Wenshan, Yunnan, China This habit of aragonite is known as flos ferri, Latin for 'iron flower'. The name does not imply an iron co...

Arsenopyrite Panasqueira Mines, Covilhã, Castelo Branco, Portugal A large plate of lustrous crystal aggregates with associated minor other sulfide...

Azurite with Malachite Milpillas Mine, Sonora, Mexico This superb, crystallized piece of Milpillas Azurite has very lustrous, rich royal blue, und...

Botryoidal Azurite from Rare Locality on Acrylic Base Sepon Mine, Vilabouly District, Savannakhet Province, Laos An exceedingly rare specimen with...

Azurite with Malachite Morenci, Greenlee County, Arizona Azurite and malachite are both copper carboanate and commonly found together, but less co...

Azurite on Malachite with Metal Stand Morenci Mine, Greenlee Co., Arizona, USA Another American Southwest classic, azurite and malachite from the ...

Azurite Pseudomorph after Malachite Milpillas Mine, Sonora, Mexico The Milpillas Mine quickly became a renowned locality for some of the finest az...

Azurite with Velvet Malachite Bisbee, Cochise County, Arizona, USA A lustrous, splendent druzy of rich blue azurite lines the pocket cavity in thi...

Two Azurite Specimens Milpillas Mine, Sonora, Mexico This lot consists of two fine miniature azurite specimens from a locality that produces among...

Azurite and Malachite Silver Bell Mine, Pima Co., Arizona, USA Azurite-malachite combinations are not new, and certainly at home in southern Arizo...

Large Azurite and Malachite Bou Beker, Touissit Disrtict, Jerada Province, Oriental Region, Morocco A large, colorful plate of azurite aesthetical...

Bladed Baryte Cavnic Mine, Cavnic, Maramureș County, Romania This is a large cabinet size specimen featuring nested and interlocking sheaves of di...

Barite on Calcite Elk Creek, Meade County, South Dakota, USA These gemmy, deep sherry-colored crystals are found in septarian nodules and need to ...

Barite Frizington, Cumbria, England, UK A fine, unusually stout cabinet-sized specimen from a classic, historic English locality. Measuring appro...

Marcasite on Barite Linwood Mine, Buffalo, Scott County, Iowa, USA This is an intriguing, three-dimensional, Escheresque piece featuring a jungle ...

Two Barytes Two fine miniatures from opposite sides of the Atlantic. The Illinois specimen, measuring approximately 5.5 x 4.3 x 3.5 cm, is a more ...

Baryte on Calcite, ref 52 Elk Creek, Meade Co., South Dakota, USA These gemmy, deep sherry-colored crystals are found in septarian nodules and n...

Barite Linwood Mine, Buffalo, Scott County, Iowa, USA The differential lusters and textures of the forms on the main crystal are fascinating. Rese...

Benitoite on Natrolite California State Gem Mine, San Benito County, California, USA This is a choice and well balanced and rich Benitoite specime...

Two Beryl Specimens Mt. Xuebaoding, Pingwu County, Sichuan, China // Minas Gerais, Brazil A sharp, lustrous example that has a maze-like surface o...

Brucite Killa Saifullah District, Balochistan Region, Pakistan. This is one of the more impressive and aesthetic specimens of yellow Brucites from...

Calcite with Pyrite Linwood Mine, Buffalo, Scott County, Iowa, USA This is a plate of lustrous, translucent to transparent scalenohedral calcite c...

Calcite Stalactite Cluster Of complex form and a fascinating study in the growth of calcite, this stalactite cluster is covered in calcite micro-c...

Calcite Elmwood Mine, Carthage, Smtih County, Tennessee, USA This fine specimen features typical lustrous and gemmy twinned scalenohedra on a thin...

Phantom Calcite Cluster Vulcan Quarry, Racine, Wisconsin, USA. Measuring approximately 10 x 8 x 5.5 cm For further information on this lot please...

Cave Calcite Stalactite with Calcite Sceptre Wenshan County, Yunnan, China A fascinating example of different generations of growth, the tapering ...

Pyrite on Calcite Xianghualing Mine, Xianghualing Sn-polymetallic ore field, Linwu County, Chenzhou, Hunan, China The delicate sprinkling of pyrit...

Calcite on Matrix Sweetwater Mine, Ellington, Reynolds County, Missouri, USA This very fine specimen features a large, more complexly grown crysta...

Calcite on Scolecite on Acrylic Base Kukana, Ahmednagar District, Nashik Division, Maharashtra, India A sculptural piece showcasing a combination ...

Calcite Cluster West Camp, Santa Eulalia, Chihuahua, This is a beautiful dome of lustrous cream-colored crystals that sparkle when rotated in the...

Quartz After Calcite Twin with Fluorite on Acrylic Base Chifeng Prefecture, Inner Mongolia, China Truly an aesthetic mineralogical oddity, this sp...

Large Golden Calcite with Double Termination Elmwood Mine, Carthage, Smtih County, Tennessee, USA This is a large, rich golden, amber-colored twin...

Large Calcite Twin on Acrylic Base Mekhtar, Loralai District, Balochistan Region, Pakistan This locality in central Pakistan is known more for flu...

Pyrite Flecks on Calcite Chenzhou, Hunan, China This good cabinet-size cluster of slightly rounded calcite rhombohedra exhibiting a preferential c...

Cavansite on Stilbite Pune District, Pune Division, Maharashtra, India At 4.5 cm across, this bright teal-blue cluster of Cavansite This is a supe...