- JEN20-31
- Hemimorphite
- 79 Mine, Hayden, Arizona, USA
- Thumbnail
- 3.1 x 2.8 x 1.7 cm
SOLD
- JEN20-28
- Gold (wire crystalline)
- Yuba Mine Greaterville, Pima Co., Arizona, USA
- Thumbnail
- 2.8 x 1.3 x 1.0 cm
SOLD
- JEN20-27
- Tourmaline on Quartz (dated 1894)
- Gilette Mine, Haddam, Connecticut, USA
- Thumbnail
- 3 x 2.5 x 1.3 cm
SOLD
- JEN20-26
- Opal
- Hosszu Hill, Megyaszo, Szerencs, Hungary
- Thumbnail
- 3.0 x 2.4 x 0.6 cm
SOLD
- JEN20-25
- Azurite "Rose"
- Copper Queen Mine, Bisbee, Arizona, USA
- Thumbnail
- 1.8 x 1.6 x 1.4 cm
SOLD
- JEN20-24
- Copper
- Franklin Lode, near Houghton, Keweenaw, Michigan, USA
- Miniature
- 3.2 x 1.8 x 1.4 cm
SOLD
- JEN20-23
- Azurite
- Copper Queen Mine, Bisbee, Arizona, USA
- Thumbnail
- 1.6 x 1.6 x 0.8 cm
SOLD
- JEN20-21
- Acanthite
- Freiberg, Saxony, Germany
- Thumbnail
- 2.2 x 2.0 x 1.7 cm
SOLD
- JEN20-20
- Silver
- El Mochito Mine, Santa Barbara Department, Honduras
- Miniature
- 3.2 x 3.1 x 0.7 cm
SOLD
- JEN20-18
- Galena
- Wilgersdorf, Westphalia, Germany
- Thumbnail
- 2.9 x 2.1 x 1.2 cm
SOLD
- JEN20-17
- Galena (dated 1836)
- Freiberg, Saxony, Germany
- Thumbnail
- 1.9 x 1.5 x 1.2 cm
SOLD
- JEN20-16
- Tourmaline
- Golconda Mine, Minas Gerais, Brazil
- Thumbnail
- 2.8 x 1.0 x 0.8 cm
SOLD
- JEN20-15
- Legrandite
- Mina Ojuela, Mapimi, Durango, Mexico
- Thumbnail
- 2.3 x 2.0 x 1.5 cm
SOLD
- JEN20-14
- Calcite var. Cobaltoan
- Kolwesi Mining District, Democratic Republic of Congo
- Miniature
- 3.6 x 1.8 x 1.3 cm
SOLD
- JEN20-12
- Mimetite
- San Pedro Corralitos, Chihuahua, Mexico
- Thumbnail
- 2.6 x 1.8 x 1.6 cm
SOLD
- JEN20-11
- Datolite
- Faraday Uranium, Mine, Bancroft, Ontario, Canada
- Thumbnail
- 2.8 x 1.9 x 1.6 cm
SOLD
- JEN20-10
- Mimetite var. Campylite
- Dry Gill Mine, Caldbeck Fells, Cumbria, England, UK
- Thumbnail
- 3.0 x 2.0 x 1.9 cm
SOLD
- JEN20-09
- Rhodochrosite
- N'Chwaning #1 Mine, N. Cape Province, South Africa
- Thumbnail
- 2.0 x 1.8 x 1.4 cm
SOLD
- JEN20-07
- Pyromorphite
- Mercur Mine, Bad Ems, Rhineland-Palatinate, Germany
- Thumbnail
- 2.6 x 1.6 x 1.5 cm
SOLD
- JEN20-05
- Calcite (twinned)
- Egremont, Cumberland, England, UK
- Thumbnail
- 2.9 x 2.2 x 0.7 cm
SOLD
- JWL19-39
- Azurite with Malachite and Calcite
- Christiana Mine, Lavrion District Mines, Lavrion District, Attiki Prefecture, Greece
- Thumbnail
- 2.5 x 1.5 x 1.4 cm
SOLD
- JWL19-38
- Fairfieldite
- Foote Lithium Co. Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
- Thumbnail
- 2.7 x 1.7 x 1.6 cm
SOLD
- JWL19-37
- Rhodochrosite on Manganite
- N'Chwaning Mine, Kalahari manganese Field, Northern Cape Province, South Africa
- Thumbnail
- 1.7 x 1.4 x 1.2 cm
SOLD
- JWL19-36
- Prehnite
- Arusha Mines, Merelani Hills, Tanzania
- Thumbnail
- 1.8 x 1.8 x 1.8 cm
SOLD
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