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Specimens of quartz geodes from Chihuahua, Mexico. These geodes are often referred to as La Choya geodes or coconut geodes, the quartz crystals within them may be clear or smoky and are often accompanied by brown calcite and agate. These samples are supplied in a white card tray with an information label, they are provided as a geode pair or as smaller geode fragments.
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Specimens of quartz geodes from Chihuahua, Mexico. These geodes are often referred to as La Choya geodes or coconut geodes, the quartz crystals within them may be clear or smoky and are often accompanied by brown calcite and agate. Geodes form as bubbles of gas within magma (the term for lava when the molten rock is still underground). Because of the temperatures difference between the magma and the pocket of gas, the crystals form slower, crystals which form slower tend to form in larger sizes and so with a geode, you have an outside which is made up of very fined grained crystals, too small to see and the inside, which is full of larger crystals. These samples are supplied in a white card tray with an information label, they are provided as a geode pair or as smaller geode fragments. These geodes would make a wonderful addition to any mineral collection.
Weight | 50 g |
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Specimen Size | 1.5" x 1.5" Quartz Geode Fragment, 2" x 2" Agate Geode Fragment, 2" x 2" Agate Geode Pair, 2" x 2" Quartz Geode Fragment |
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Quartz geode mineral specimens, nodules lined with sparkly quartz crystals collected from the Sahara desert, Morocco. Bright white crystals which are vivid when set against a black backdrop, these specimens are ideal for young collectors, enthusiast as a gift or for those of you who want something different to display in a home or office. Available in various sizes and supplied in a card tray with an information label.
Out of stock
Milky quartz mineral specimens from Iveland, Norway, collected by staff, these samples have a fine crystalline texture and are in a massive form. Translucent, they have a pale grey, milky white colour and are sometimes known as snow quartz or simply quartz. Available in 3 sizes and supplied in a card tray with a label.
100 in stock
Purple quartz mineral specimens from Morocco, the crystal beds exhibit quartz crystal points on agate or chalcedony (all belonging to the quartz family of minerals), the colour is a hue of purple, but faded
Baryte mineral specimens, unusual samples collected from Foss mine in Scotland, they have a fine crystalline texture instead and are quite robust specimens. Pieces are off white in colour and may show a shimmer effect in certain lighting conditions. Available in various sizes, supplied in a card tray with an information label.
Orthocalse feldspar mineral specimens from Strathpeffer, Ross-Shire, Scotland. It exhibits a very pale pink almost white colouration and details excellent cleavage planes with rhombic crystal forms, a common mineral found in granites and rhyolites, orthoclase belongs to the feldspar family of minerals and can be found all over the world. Specimens are available in various sizes and come supplied in a card tray with an information label.
Out of stock
Halite mineral specimens from the Boulby mine in Redcar, North Yorkshire, UK. Halite is a salt mineral and has a cubic crystal system and vitreous lustre, these specimens are rough and available in various sizes, suitable for educational use, supplied in a card tray with a label.
Out of stock
Massive specular hematite from Brazil, black colouration and metallic lustre which gives the crystals a sparkling appearance. These particular specimens are of specularite crystals in a massive form, therefore the samples have a highly crystalline texture. They come from Brazil and give off a metallic shimmer when held under certain lighting. Available in various sizes and supplied in card tray with an information label.
Out of stock
Baryte crystal blade cluster from Erfoud, Morocco, measuring up to 4 inches in size, these mineral specimens exhibiting excellent crystal habits and calming colouration along with a slight sparkle when viewed in certain lighting conditions. Ideal pieces for display use.
Out of stock
Chalcedony mineral specimens from Morocco, the pieces belong to the quartz family of minerals and is very similar to carnelian, even having a waxy lustre, although it tends to have a botryoidal crystal habit. The pieces are blue, white, red and orange and available in various sizes, supplied in a card tray with an information label.
Pyrtic crystal cubes from Spain, depicting excellently the cubic crystal form that pyrite forms in. These samples exhibit the brassy colouration and metallic lustre expected from pyrite and are available in two sizes, 1 cm and 2 cm cubes, supplied in a polythene bags with a data label.
Out of stock
Salt Pseudomorphs on a limy marl matrix collected from the Triassic Aust Cliff in Avon. Numerous cubic imprints can be identified on the limy marl substrate of these specimens; they serve as interesting educational pieces.
20 in stock
Specular hematite mineral specimens from Florence Mine, Egremont, Cumbria. They are on a massive hematite matrix, black in colour with a metallic lustre giving the samples a silver, shimmering appearance. The specularite has excellent but small anhedral crystal habits. Available in a range of sizes, the pieces will come supplied in a card tray with label.
Out of stock
Baryte mineral specimens collected form Cumbria, exhibiting a bladed crystal habit or massive form, the dense specimens are an off white, yellow or brown colour due to staining from hematite (iron ore), available in various sizes, ideal for educational use.
Out of stock
gypsum satin spar with an orange colouration, found in Morocco, these mineral specimens exhibit excellent fibrous texture and a silky lustre, along with the unusual orange colour, makes these particular samples very sought after simply just for their unique appearance. Available in 2″ x 2″ size pieces only and supplied in a card tray with a label.
Stunning red quartz ( Hematoide ) over a baryte matrix collected from Jebel Saghro in Morocco. This unique variety of quartz owes its red colour to very fine hematite inclusions which have become incorporated into the quartz mass
Out of stock
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