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PRODUCTS BY WEIGHT
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Specimens of Rock Crystal Points, collected from Madagascar. Rock Crystal is a term that describes clear quartz. Quartz is a silicate mineral and one of the most abundant on the planet. These specimens are available in multiple sizes and come in a card tray with an information label.
All specimens supplies in a white card tray with information label.
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Specimens of Rock Crystal Points, collected from Madagascar. Rock Crystal is a term that describes clear quartz. Quartz is a silicate mineral and one of the most abundant on the planet. These specimens are available in multiple sizes and come in a card tray with an information label.
Weight | 200 g |
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Size | 1.5" x 1.5", 2" x 2", 3" x 2" |
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Smokey quartz is a dark variation of quartz, it is often translucent and a shade of black or grey however, some specimens may be completely opaque and black. The colour is due to free silicon at the time the quartz was forming, formed from silicon dioxide from natural radiation. These particular mineral specimens are of the individual crystal points and are of very high quality, they display the quartz crystals termination very well and exhibit a very dark grey sometimes black colouration with minimal transparency, almost opaque. The crystals come from Madagascar and come supplied in two different sizes, in a white card tray with information label. Please note that size variation is approximate, and will vary between pieces.
Quartz crystals from Madagascar, these mineral specimens are large in sizes, between 10 to 15 cm, as they are B grade, they are not completely transparent, but cloudy and they still show the termination of the points and crytsal system. Ideally suited for educational use if large numbers are required for students to observe.
Quartz crystals from Madagascar, these mineral specimens are small in size, between 3 to 5 cm, as they are A grade, they are completely transparent, crystal clear show the excellent termination of the points and crytsal system. Ideally suited for university level educational use if large numbers are required for students to observe or for serious collectors.
Quartz crystals from Madagascar, these mineral specimens are large in size, ranging between 5 to 10 cm. We characterize them as B grade, as they are not completely transparent, but cloudy and slightly iron stained whilst still showing the termination of the points and crystal system. Ideally suited for educational or lapidary use if large numbers of crystals are required.
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.
29 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.
Magnesite mineral specimens from Greece, the samples are an off white colour and exhibit a somewhat botryoidal texture, formed around ultramafic rocks and metamorphic zones, these specimens are limited and will come supplied in a card tray with a data label.
Chalcopyrite mineral samples from Morocco, exhibiting typical yellow brassy colour with a metallic lustre. Lower grade when compared to our Norwegian stock but also includes occurrences of bornite which is a blue colour. Samples are available in 3 sizes, each supplied in a labelled card tray.
184 in stock
Gypsum satin spar mineral specimens from Morocco, which are a pearly white colour composed of high quality fibrous crystals which are long and orientated in the same direction giving the samples a silky lustre. These pieces are available in various optional sizes, supplied in a card tray with a label.
432 in stock
Chalcopyrite mineral specimens from Sulitjelma, Norway, a major copper ore mineral, these pieces exhibit excellent quality chalcopyrite detailing the shiny brassy yellow colouration and metallic lustre expected. These mineral specimens are approximately 70% – 80% chalcopyrite and are available in various sizes and come supplied in card tray with an information label.
Specimens of Salt Pseudomorphs on a limy matrix, collected from the Triassic Aust Cliff in Avon, UK. Salt Pseudomorphs serve as important inicators of paleoenvironmental conditions. They typically form in semi arid (dry) climates, where saline water evaporates, which leaves behind cubic salt crystals. These salt crystals later dissolve, occasionally preserving their cubic imprints These specimens are available in multiple sizes and come supplied in a white card tray with an information label.
20 in stock
Sulphur mineral specimens (also spelt sulfur) from Bolivia, these fine crystalline masses give off a pungent odour as expected of this mineral and have a pale yellow colouration to them. They formed in volcanic zones and are excellent for the more serious collector. Available in one size only and supplied in a card tray with a data label.
13 in stock
Native copper ore mineral specimens from the famous Keweenaw copper deposits of Mitchigan, U.S.A. The specimens have a heavy red-orange metallic specimens with streaks of blue-green oxidation and a wiry crystal habit. Available in a range of sizes.
Milky quartz mineral specimens from Norway, with a pale white colouration, hence the name, sometimes also known as white quartz, snow quartz or simply quartz. These particular samples were collected by staff from Iveland, Norway. This locality is also where we collected the smokey quartz from. It is in a massive form and has a very fine crystalline texture, this also results in it sometimes being sharp, so caution is advised when handling these samples. It is available in various sizes and supplied in a card tray with an information label.
Dolomite crystal beds, pink in colour form Morocco, the presence of manganese results in a pale pink hue, these mineral specimens also have larger crystals than the UK material and are higher quality. Available in various optional sizes, supplied in tray with a data label.
50 in stock
Iceland spar is a clear variation of calcite, it exhibits the rhombic crystal system of calcite perfectly, the crystals easily divide into rhombs, making them well sought after for a variety of reasons. Originally reported from Helgustadir Mine, Eskifjord, Iceland, hence its name. One of the most remarkable aspect of Iceland spar is its refractive properties. When light passes through one of the crystals, it is divided into two rays at different angles which results in a double refraction effect. Essentially, anything seen though the crystal is seen in double. This can best be seen if you place the calcite over some text, it will appear as if it has been printed twice. These mineral samples come from Santa Eulalia, Chihuahua, Mexico and are available in 2 sizes: Upto 1″ and Over 1″. They come in a card tray with an information label.
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