54mm x 47mm x 21mm (156g) Transparent Yellow Calcite Crystal (Iceland Spar)
Britain-E-Spheres Crystal - A 54mm x 47mm x 21mm (156g) Transparent Yellow Calcite Crystal (Iceland Spar) - Item images are taken close up (magnified) ***please carefully check approximate dimensions within the title and listing for size and weight of product***
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The other polymorphs are the minerals aragonite and vaterite. Aragonite will change to calcite at 380–470°C and vaterite is even less stable. Calcite crystals are trigonal-rhombohedral, though actual calcite rhombohedra are rare as natural crystals. However, they show a remarkable variety of habits including acute to obtuse rhombohedra, tabular forms, prisms, or various scalenohedra.
Calcite exhibits several twinning types adding to the variety of observed forms. It may occur as fibrous, granular, lamellar, or compact. Cleavage is usually in three directions parallel to the rhombohedron form. Its fracture is conchoidal, but difficult to obtain. It has a defining Mohs hardness of 3, a specific gravity of 2.71, and its luster is vitreous in crystallized varieties. Color is white or none, though shades of gray, red, orange, yellow, green, blue, violet, brown, or even black.
Calcite is transparent to opaque and may occasionally show phosphorescence or fluorescence. A transparent variety called Iceland spar is used for optical purposes. Acute scalenohedral crystals are sometimes referred to as "dogtooth spar" while the rhombohedral form is sometimes referred to as nailhead spar. Single calcite crystals display an optical property called birefringence. This strong birefringence causes objects viewed through a clear piece of calcite to appear doubled.
Calcite is a common constituent of sedimentary rocks, limestone in particular, much of which is formed from the shells of dead marine organisms. Approximately 10% of sedimentary rock is limestone. Calcite is the primary mineral in metamorphic marble. It also occurs as a vein mineral in deposits from hot springs, and it occurs in caverns as stalactites and stalagmites. Lublinite is a fibrous, efflorescent form of calcite.
Calcite increases and amplifies energy. This makes it an excellent stone for distance healing, as well as other types of healing. One of the energies it amplifies is learning abilities, and thus is a great stone for students. Calcite is a protecting, grounding and centering stone, and can help bring inner peace. Since calcite also promotes creativity and imagination, this inner peace it can bring is a vibrant one. Calcite has been said to increase prosperity. It can also be helpful in astral travel and in channeling, as well as increasing intuition. Calcite is also a stone of spirituality and wisdom. All calcites are helpful in lessening of fear and reducing stress. Calcite is probably the premier cleanser of stored negative energies in the human system, and works on all levels from the physical to the etheric. This makes it a very purifying stone. It can also be used to clear negativity in the environment, such as a room that it's in. Optical calcite (Iceland Spar) is particularly good for bringing hope to fearful or stressful situations. In the realm of relationships, calcite brings its properties of grounding and centering, to make it a stone of reconciliation. Specimens will have surface and interior inclusions and fissures that refract, transmit and reflect light in thousands of directions - this is a natural product, so no two crystals will be the same. Beautiful addition to a rock/crystal collection, or a stunning point of interest ornament. The items are new but contains small surface anomalies and inclusions, with fissures and inclusions running through the crystals in numerous directions (due to it being a naturally occurring crystal) - these add interesting facets to the specimen and means that no two products will ever be the same, in either looks, the way they react to light sources, or colour. Sizes are approximate. Images are of actual product
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