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Calcite
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9.4" Polished Sicat Plume Agate Slab - Cady Mountains, California
$395
2.2" Polished Purple Passion Agate Slice - Chihuahua, Mexico
$39
9.4" Polished, Free-Standing, Hubbard Basin Petrified Wood
$245
9.4" Petrified Wood (Sycamore) Slab - Parker, Colorado
$135
9.4" Green, Bladed Prehnite Crystals with Quartz - Morocco
$135
9.4" Free-Standing, Polished Petrified Wood - Madagascar
$245
9.4" Large, Cut & Polished Ammonite Fossil (Half) - Madagascar
$165
2.7" Free-Standing, Polished Bumblebee Jasper - Indonesia
$25
4.2" Polished Purple Passion Agate Section - Chihuahua, Mexico
$99
2.4" Quartz Crystal Cluster with Epidote Inclusions - China
$45
9.4" Deep Green Seam Agate Slab - California
$115
3.25" Teal-Blue Amazonite Crystal - Lake George, Colorado
$99
2.05" Teal-Blue Amazonite Crystal - Lake George, Colorado
$59
7.1" Fluorescent Hexagonal Calcite Crystals - China
$295
4.6" Polished Laguna Agate Slice - Mexico
$135
9.4" Fossil Running Rhino (Hyracodon) Partial Skull - South Dakota
$1,495
9.4" Triassic Petrified Wood (Conifer) Slab - Circle Cliffs, Utah
$95
1.75" Intricate Botryoidal Rhodochrosite - Santa Eulalia, Mexico
$19
3.7" Fluorescent Calcite Crystal Cluster (New Find!) - Potosi Mine
$55
3.75" Fluorescent Calcite Crystal Cluster (New Find!) - Potosi Mine
$55
3" Fluorescent Calcite Crystal (New Find!) - Potosi Mine
$29
3.5" Fluorescent Calcite Crystal Cluster (New Find!) - Potosi Mine
$45
6.3" Highly Fluorescent Calcite Crystal Cluster - Wenshan Mine, China
$495
2" Polished Banded Laguna Agate - Mexico
$55
4.9" Polished Laguna Agate Nodule Half - Mexico
$325
2.6" Fluorite, Calcite and Quartz Association - Cocineras Mine, Mexico
$29
6.3" Selenite Desert Rose on Stand - Chihuahua, Mexico
$75
7.4" Purple Edge Fluorite Crystal Cluster - Qinglong Mine, China
$115
5.9" Polished, Free-Standing Blue Calcite - Madagascar
$59
5.55" Polished, Free-Standing Blue Calcite - Madagascar
$45
5.6" Polished, Free-Standing Blue Calcite - Madagascar
$39
4.2" Polished, Free-Standing Blue Calcite - Madagascar
$25
5.6" Polished, Free-Standing Blue Calcite - Madagascar
$35
5.8" Polished, Free-Standing Blue Calcite - Madagascar
$49
1.2" Botryoidal Rhodochrosite Formation - Santa Eulalia, Mexico
$25
1.65" Intricate Botryoidal Rhodochrosite - Santa Eulalia, Mexico
$25
1.2" Intricate Botryoidal Rhodochrosite - Santa Eulalia, Mexico
$25
1.5" Pink Botryoidal Rhodochrosite - Santa Eulalia, Mexico
$19
3.9" Polished, Free-Standing Green Pistachio Opal - Madagascar
$35
3.6" Polished, Free-Standing Green Pistachio Opal - Madagascar
$25
1.95" Polished Purple Charoite Cube with Base - Siberia
$95
1.95" Polished Purple Charoite Cube with Base - Siberia
$95
1.95" Polished Purple Charoite Cube with Base - Siberia
$95
9.4" Fossil Brachiopod (Rafinesquina) and Bryozoan Plate - Indiana
$35
4.2" Free-Standing Crystal Filled Celestine Geode - Madagascar
$65
3" Quartz and Calcite with Metacinnabar Inclusions - Cocineras Mine
$25
2.95" Lustrous Smoky Quartz Crystals on Microcline - Colorado
$69
5.5" Free-Standing, Polished Fuchsite - Madagascar
$35
4.7" Free-Standing, Polished Fuchsite - Madagascar
$29
4.8" Free-Standing, Polished Fuchsite - Madagascar
$29
4.8" Free-Standing, Polished Fuchsite - Madagascar
$29
15.6" Flower-Like Sandstone Concretion - Pseudo Stromatolite
$195
3.8" Free-Standing, Polished Garnetite (Garnet) - Madagascar
$35
4.2" Free-Standing, Polished Garnetite (Garnet) - Madagascar
$32
3.6" Free-Standing, Polished Garnetite (Garnet) - Madagascar
$29
3.3" Free-Standing, Polished Garnetite (Garnet) - Madagascar
$25
3.7" Unique, Fluorescent Cave Calcite Formation - Wenshan Mine
$99
Ruby Red Brookite Crystals On Quartz - Pakistan
$59
2.2" Yellow Calcite Crystal Cluster - Missouri
$29
5.7" Polished Agua Nueva Agate Slice - Chihuahua, Mexico
$125