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  2. Countertop - Wikipedia

    en.wikipedia.org/wiki/Countertop

    Countertop. A countertop, also counter top, counter, benchtop, worktop (British English) or kitchen bench (Australian or New Zealand English), bunker (Scottish English) is a raised, firm, flat, and horizontal surface. They are built for work in kitchens or other food preparation areas, bathrooms or lavatories, and workrooms in general.

  3. Bristol Diamonds - Wikipedia

    en.wikipedia.org/wiki/Bristol_Diamonds

    Bristol Diamonds are quartz crystals found in geodes and geological rock formations which occur in dolomitic conglomerate in the Avon Gorge in Bristol, England. Their origin lies in geological processes of the Triassic period, about 250 to 200 million years ago. The Bristol Diamonds became popular novelties for visitors to the spa at Hotwells ...

  4. Quartzite - Wikipedia

    en.wikipedia.org/wiki/Quartzite

    Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface is glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization, causing streaks and lenses to form within the quartzite. [1 ...

  5. Engineered stone - Wikipedia

    en.wikipedia.org/wiki/Engineered_stone

    Engineered stone. Engineered stone is a composite material made of crushed stone bound together by an adhesive to create a solid surface. The adhesive is most commonly polymer resin, with some newer versions using cement mix. This category includes engineered quartz (SiO 2), polymer concrete and engineered marble stone. [1]

  6. Quartz - Wikipedia

    en.wikipedia.org/wiki/Quartz

    Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...

  7. List of World Heritage Sites in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_World_Heritage...

    There are 35 UNESCO World Heritage Sites in the United Kingdom and the British Overseas Territories. [2] The UNESCO list contains one designated site in both England and Scotland (the Frontiers of the Roman Empire) plus eighteen exclusively in England, six in Scotland, four in Wales, two in Northern Ireland, and one in each of the overseas territories of Bermuda, Gibraltar, the Pitcairn ...

  8. List of largest companies in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_companies...

    2022 Fortune list. This list displays all 18 British companies in the Fortune Global 500, which ranks the world's largest companies by annual revenue. The figures below are given in millions of US dollars and are for the fiscal year 2021. Also listed are the headquarters location, net profit, number of employees worldwide and industry sector of ...

  9. Hexagonal crystal family - Wikipedia

    en.wikipedia.org/wiki/Hexagonal_crystal_family

    In the hexagonal family, the crystal is conventionally described by a right rhombic prism unit cell with two equal axes (a by a), an included angle of 120° (γ) and a height (c, which can be different from a) perpendicular to the two base axes. The hexagonal unit cell for the rhombohedral Bravais lattice is the R-centered cell, consisting of ...

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