343 - Pedrara Onyx - This is a banded pedrara onyx marble collected from Baja, Mexico.

352 - Ammolite Ammonite - Ammolite is a gemstone formed from the fossilised shells of Ammonites, most commonly Placenticeras meek...

366 - Green Onyx - Green Onyx marble from Chile.

407 - Rotularia bognoriensis - Mantell collection. Eocene, London Clay. Found Bognor, Sussex.

476 - Pyrite - Pyrite 'suns' of radiating crystals, from Sparta, Illinois, U.S.A.

498 - Hadjaja Onyx - Hadjaja Onyx from Algeria.

510 - Granodiorite - Fresh granodiorite from Chuquicamata mine, Chile. Primary Commodity: Copper (Cu).

586 - Cuprite - Granular cuprite with green malachite from Cliffe Hill Quarry. Product, Granite aggregate.

659 - Banded boron - Banded boron ore from Dalnegorsk, Russia. Primary Commodity: Boron.

690 - Skutterudite - Colloform mass of silver-white skutterudite (CoAs3) associated with crimson-pink erythrite (Co3[AsO4]2.8H2O)...

725 - Ammonlite Ammonite - Ammolite is a gemstone formed from the fossilised shells of Ammonites, most commonly Placenticeras mee...

790 - Chalcopyrite 2 - Chalcopyrite in quartz vein with minor pale green sericite. From Mount Lycell, Tasmania. Primary Commodity...

811 - Onyx marble - A highly decorative Onyx marble from North Africa. From the building store collection.

6528 - Emerald - Emerald. Possibly from the collection of Rt Hon Charles Greville in 1810. Emerald is a variety of beryl (berylli...

886 - Sphalerite with galena - Botryoidal concretionary growth of sphalerite (ZnS) with galena (PbS) from Pomorzany mine, Poland....

903 - Garnetiferous albitic granite - Garnetiferous albitic granite from Garve, Dingwall in Rosshire, Scotland.

912 - Chalcopyrite 2 - Chalcopyrite in quartz vein with minor pale green sericite. From Mount Lycell, Tasmania. Primary Commodity...

911 - Quartz variety Chalcedony - A geode containing stalactitic growths of Chalcedony, from Chihuahua, Mexico. Chalcedony is the...

974 - Rutile and Quartz - Golden needles of Rutile forming a 6 pointed star with a silver Hematite centre on smoky quartz, from N...

989 - Chalcopyrite - ????Massive chalcopyrite (CuFeS2) veins in a quartz and tourmaline matrix from ??Geevor Tin Mine, Cornwall, ...

991 - Skutterudite - Colloform mass of silver-white skutterudite (CoAs3) associated with crimson-pink erythrite (Co3[AsO4]2.8H2O)...

1020 - Sapphire - Corundum variety Sapphire BM.1934,873 A pale blue Sapphire, one of the gem varieties of Corundum, with a milky ...

1050 - Siltstone - Siltstone with quartz veining, 51.40g/t gold from Bakyrchik, Auezov, East Kazakstan. Metal of interest: Gold (...

1092 - Carbon Leader Reef - Carbon Leader Reef, quartz pebbles in dark carbonaceous matrix from Witwatersrand Basin, South Africa...

1123 - Green Onyx - Green Onyx marble from Chile.

1154 - Banded galena - Banded galena, sphalerite, strontian barite and calcite encrusted with pyrite. From Hampstead Farm Quarry,...

1208 - Chalcopyrite - ????Massive chalcopyrite (CuFeS2) veins in a quartz and tourmaline matrix from ??Geevor Tin Mine, Cornwall,...

1176 - Granodiorite - Fresh granodiorite from Chuquicamata mine, Chile. Primary Commodity: Copper (Cu).

1173 - Opal ring - Black Opal from Lightning Ridge, NSW, Australia, set in a ring. Part of the Lady Church Collection. Opal is a ...

1245 - Agate - A polished slice of Agate (a variety of Chalcedony) with concentric banding which is artificially coloured. Purcha...

1228 - Onyx marble - A highly decorative Onyx marble from North Africa. From the building store collection.

1222 - Hadjaja Onyx - Hadjaja Onyx from Algeria.

1266 - Ammonlite Ammonite - Ammolite is a gemstone formed from the fossilised shells of Ammonites, most commonly Placenticeras me...

1326 - Moss Agate - A polished slice of Moss Agate (a variety of Chalcedony) with inclusions of a green mineral which has grown w...

1358 - Porphyrite - This Rock is porphyrite (grey) with jasper (red) from Antrim, Northern Ireland.

1368 - Listvenite - Listvenite (after mylonite of mafic/ultramadic rock) from Berezovsky, Russia. Commodity, Gold (Au)

1390 - Sphalerite with galena - Botryoidal concretionary growth of sphalerite (ZnS) with galena (PbS) from Pomorzany mine, Poland...

1393 - Jasper - A polished piece of Jasper (a variety of Chalcedony) with patterns like a desert landscape. From near Cairo, Egyp...

1403 - Hadjaja Onyx - Hadjaja Onyx from Algeria.

1426 - Quartz variety Chalcedony - A geode containing stalactitic growths of Chalcedony, from Chihuahua, Mexico. Chalcedony is th...

1529 - Ores - Tray of various ores

1477 - Molybdenite - Molybdenite in silicified breccia from Climax, Colorado, USA. Quartz and fine grained Quartz -molybdenite vi...

1606 - Ceriocava corymbosa - Polished slab of Calcaire a Polypiers from the Bathonian of Ranville, Calvados, Normandy, containing...

1609 - A lump of black and pink skutterudite mineral against a black background. - Colloform mass of silver-white skutterudite (C...

1674 - Heulandite - Heulandite-(Ca) in sheaves of salmon-pink crystals on white Mordenite, from Rat's Nest Claim. Custer, Idaho, ...

1677 - Fluorite - Triangular cut stone from Mexico. Fluorite is the mineral form of calcium fluoride, CaF2. 45.04ct

1781 - Pedrara Onyx - This is a banded pedrara onyx marble collected from Baja, Mexico.

1785 - Molybdenite - Molybdenite in silicified breccia from Climax, Colorado, USA. Quartz and fine grained Quartz -molybdenite vi...

1796 - Agate - A polished slice of Agate (a variety of Chalcedony) with concentric banding which is artificially coloured. Purcha...

1808 - Sphalerite with galena - Botryoidal concretionary growth of sphalerite (ZnS) with galena (PbS) from Pomorzany mine, Poland...