835 - Rhodochrosite - Polished slab showing banded layers and spherical concretions, from Capillitas mine; Argentina

6530 - Kaleidoscope - The black mineral, appearing like lead frames in a stained-glass window, is graphite, traversing the colour...

6302 - Native gold on quartz - Whilst quartz is one of the most common minerals found in the earth's crust, Gold is much rarer. T...

6301 - Native silver - Silver found in pure form in the ground is called native silver (Ag) - it is an elemental metal and struct...

6303 - Galena - Galena on Siderite from Neudorf, Harz, Saxony-Anhalt, Germany

6308 - Manganite - Manganite from Ilfeld, Nordhausen, Harz, Thuringia, Germany

6312 - Galena - Galena on Siderite from Neudorf, Harz, Saxony-Anhalt, Germany

6300 - Corundum - Corundum (red) in painite crystal specimen, from Upper Burma, added to Natural History Museum collections in 19...

6290 - Baryte - Mineral crystal formation in shape of a human hand with a finger pointing up.

6288 - Native silver - Silver found in pure form in the ground is called native silver (Ag) - it is an elemental metal and struct...

5768 - Agate - Sagentic inclusions in Lake Superior agates may include needle like crystals of zeolite minerals, alteration produ...

6133 - Urinary stones - Urinary stones. Copper engraving based on a drawing by Franz Bauer. E. Home, Lectures on comparative anat...

6076 - Vauquelinite - Vauquelinite from Pontgibaud, Puy-de-Dôme, Auvergne, France. BM.94727

5716 - Agate from Nova Scotia - Nova Scotia's agate comes in many different varieties and may contain inclusions such as green ch...

5048 - Moon rock fragment - Moon rock fragment

4893 - Glossopteris indica, Antarctic fossil leaf - Fossilised plant leaf collected by Robert Falcon ScottÆs British Antarctic Ex...

4853 - Cordierite-biotite-gneiss - Geological specimen collected by Scott's British Antarctic Expedition 1910-1913, also known as...

4852 - Basalt bomb - Geological specimen collected by Scott's British Antarctic Expedition 1910-1913, also known as the Terra Nov...

4846 - Kenyte lava - Geological specimen collected by Scott's British Antarctic Expedition 1910-1913, also known as the Terra Nov...

4845 - Diorite intruded by microgranite - Geological specimen collected by Scott's British Antarctic Expedition 1910-1913, also k...

4822 - Labradorite - A specimen of labradorite.

4821 - Leopardskin stone - Leopardskin stone specimen.

4820 - Jasper - A specimen of red jasper.

4819 - Hematite group. - A group of hematite.

4818 - Hematite - Hematite specimen.

4817 - Jasper - Specimen of brecciated jasper.

4816 - Lepidolite - Lepidolite specimen.

4815 - Kyanite - Kyanite specimen.

4812 - Jasper - A specimen of spotted jasper.

4811 - Jasper - A specimen of yellow jasper.

4810 - Sulphur - Sulphur crystals.

4809 - Tiger eye. - Tiger eye specimen.

4808 - Septarian nodule - Septarian nodule.

4807 - Opal - Opal in matrix specimen.

4806 - Quartz - A specimen of quartz.

4805 - Quartz. - A specimen of green quartz.

4804 - Obsidian - Obsidian specimen.

4803 - The Beddgelert (H5) ordinary chondrite - Photograph of the Beddgelert (H5) ordinary chondrite, clearly showing flecks of i...

4802 - Lepidolite - Lepidolite specimen.

4801 - Magnesite. - Dyed magnesite specimen.

4800 - Partially fusion-crusted stone - A 294g (10oz) partially fusion crusted stone from the Camel Donga eucrite strewn field. T...

4799 - Meteorite - The conical shape points in the direction of travel during atmospheric flight, and the ridges that flow away f...

4794 - Tourmaline - Tourmaline in quartz.

4790 - Unakite - Unakite specimen.

4788 - Quartz. - Rose quartz specimen.

4787 - Quartz - Quartz specimen.

4786 - Quartz - Smoky quartz specimen.

4785 - Sodalite - Sodalite specimen.

4776 - Obsidian. - Specimen of mahogany obsidian.

4775 - Pyrite - Pyrite specimen.