geological
Showing 1–20 of 100 results
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Geological Specimens
Radiolarite — Display Grade
Mohs hardness: 6.5–7$21.36 -
Geological Specimens
Volcanic Bomb — Breadcrust
Mohs hardness: 5–6$102.88 -
Geological Specimens
Chalk with Flint Nodule — Polished Face
Mohs hardness: 1–7$22.18 -
Geological Specimens
Volcanic Bomb — Breadcrust — Large Specimen
Mohs hardness: 5–6$50.84 -
Geological Specimens
Chalk with Flint Nodule — Large Specimen
Mohs hardness: 1–7$50.31 -
Geological Specimens
Banded Iron Formation — Large Specimen
Mohs hardness: 5.5–7$129.60 -
Geological Specimens
Amethyst Cathedral Geode — Half — Specimen Grade
Mohs hardness: 7$1,860.36 -
Geological Specimens
Fulgurite — Desert Glass Tube — Display Grade
Mohs hardness: 5.5–6$81.44 -
Geological Specimens
Obsidian — Mahogany Flow — Large Specimen
Mohs hardness: 5–5.5$123.65 -
Geological Specimens
Desert Varnish Sandstone — Display Grade
Mohs hardness: 7$41.30 -
Geological Specimens
Garnet Schist
Mohs hardness: 5.5–7.5$108.33 -
Geological Specimens
Pele’s Tears — Hawaiian — Specimen Grade
Mohs hardness: 5–5.5$59.91 -
Geological Specimens
Fulgurite — Desert Glass Tube — Polished Face
Mohs hardness: 5.5–6$71.61 -
Geological Specimens
Oolitic Limestone — Large Specimen
Mohs hardness: 3$19.86 -
Geological Specimens
Pumice from Santorini — Display Grade
Mohs hardness: 5.5–6$54.44 -
Geological Specimens
Suevite — Impact Breccia — Display Grade
Mohs hardness: varies$119.16 -
Geological Specimens
Serpentinite — Display Grade
Mohs hardness: 3–4$73.35 -
Geological Specimens
Celestite Geode — Whole — Specimen Grade
Mohs hardness: 3–3.5$591.94 -
Geological Specimens
Obsidian — Mahogany Flow — Display Grade
Mohs hardness: 5–5.5$28.68 -
Geological Specimens
Radiolarite
Mohs hardness: 6.5–7$43.33