GB-MARBLE STONE EXPERTS FROM THE QUARRY TO THE CUSTOMER

We work with our quarry partners around the globe to find the highest quality stone the working in conjunction with our expert processing partners based in Arcos in Portugal and Verona in Italy. We can ensure that you are receiving the highest quality stone that will improve the astetics and value of any property.

Granite is the most common example of igneous stone, whereas Limestone and Travertine are both examples of sedimentary stone. Marble and Slate are examples of the metamorphic range of stone.

Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble may be foliated. Geologists use the term “marble” to refer to metamorphosed limestone; however, stonemasons use the term more broadly to encompass unmetamorphosed limestone. Marble is commonly used for sculpture and as a building material.

Agates and onyx are both forms of chalcedony, a member of the quartz family. Chalcedony is cryptocrystalline quartz which means that you can’t see its crystalline structure without powerful magnification. The overall thinking of most crystal enthusiasts is that agates have bands and onyx do not, however that is not true.

Both agates and onyx have banding. The banding on agates are more circular or ring-like and the bands on onyx are usually straight and parallel. Agate banding may be caused by various colors or structures of the layers or both Agates tend to be more nodule shaped stones with inclusions and translucence and onyx is usually more consistent in size and shape. Another defining trait is that agates are often multi colored with translucency whereas onyx often tends to have more of a solid color base.

Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth’s continental crust, behind feldspar.

Quartz crystals are chiral, and exist in two forms, the normal α-quartz and the high-temperature β-quartz. The transformation from α-quartz to beta-quartz takes place abruptly at 573 °C (846 K). Since the transformation is accompanied by a significant change in volume, it can easily induce fracturing of ceramics or rocks passing through this temperature limit.

There are many different varieties of quartz, several of which are semi-precious gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia.

Travertine is a form of limestone deposited by mineral springs, especially hot springs. Travertine often has a fibrous or concentric appearance and exists in white, tan, cream-colored, and even rusty varieties. It is formed by a process of rapid precipitation of calcium carbonate, often at the mouth of a hot spring or in a limestone cave. In the latter, it can form stalactites, stalagmites, and other speleothems. It is frequently used in Italy and elsewhere as a building material.

Travertine is a terrestrial sedimentary rock, formed by the precipitation of carbonate minerals from solution in ground
and surface waters, and/or geothermally heated hot-springs. Similar (but softer and extremely porous) deposits formed from ambient-temperature water are known as tufa.

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