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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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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
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
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.
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
Pyrite on Rhaetic Bone Bed collected from Westbury-on-Severn, Gloucestershire. Of our specimens it is the pyrite crystal bed which is the key feature, some specimens may exhibit bones or scales but naturally this is no guarantee
9 in stock
Rhodolite garnets in quartz and mica schist matrix from Southern Norway exhibiting bright vibrant pink coloured garnets in a white quartz and metallic grey mica schist with a start contrast of colours, these minerals specimens are available in 3 sizes and come supplied in a card tray with a label.
Specimens of white coloured Plagioclase Feldspar also known as a Albite-Anorthite Series mineral. The specimens come from Osedalen, Southern Norway and are supplied in a 2″x2″ 3″x2″ 4″x3″ card tray with an information 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
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
Specimens of small almandine garnets found in India. These specimens are supplied in a small white card tray with an information label. The specimens are approximately 1″ – 1.5″ cm in diameter though this will vary slightly.
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
These particular samples are a milky white to pale yellow colour and show typical fibrous crystal habit expected from Witherite. Samples are supplied in a white card with an information label.
Tektite mineral specimens which were collected from Thailand, and have formed an irregular ‘tear drop’ shape. Each specimen measures 10 – 20mm approx in size. Radiometric dating gives an approximate age of 700,000 years old. Specimens are irregular in shape and are mainly black & opaque with a glassy lustre on fractured surfaces.
Baryte mineral specimens collected form Somerset in the UK, 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.
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