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Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO 3) or dolomite (CaMg (CO 3) 2) that have recrystallized under the influence of heat and pressure. [1] It has a crystalline texture, and is typically not foliated (layered), although there are exceptions. In geology, the term marble refers to metamorphosed ...
A black carbon fibre (used as a reinforcement component) compared to a human hair. Composites are formed by combining materials together to form an overall structure with properties that differ from that of the individual components. A composite material (also called a composition material or shortened to composite, which is the common name) is ...
On 19 December 1902, Martin F. Christensen filed U.S. Patent No. 802495A, [7] for a machine that made spherical bodies or balls. The patent was published on 24 October 1905. [8] The first machine-made marbles were created in a barn behind Christensen's house, which led to a manufacturing facility. [9] This machine could only round one marble at ...
Alabaster is a porous stone and can be "dyed" into any colour or shade, a technique used for centuries. [13] For this the stone needs to be fully immersed in various pigmentary solutions and heated to a specific temperature. [13] The technique can be used to disguise alabaster.
Carrara marble, or Luna marble (marmor lunense) to the Romans, is a type of white or blue-grey marble popular for use in sculpture and building decor. It has been quarried since Roman times in the mountains just outside the city of Carrara in the province of Massa and Carrara in the Lunigiana , the northernmost tip of modern-day Tuscany , Italy.
Art marble. Art marbles are high quality collectible marbles arising out of the art glass movement. They are sometimes referred to as contemporary glass marbles to differentiate them from collectible antique marbles, and are spherical works of art glass. Glass artists interest in marbles at the end of the twentieth century brought about a ...
Lab-grown diamonds of various colors grown by the high-pressure-and-temperature technique. Laboratory-grown (LGD), also called lab-grown diamond, [1] laboratory-created, man-made, artisan-created, artificial, synthetic, or cultured diamond, is diamond that is produced in a controlled technological process (in contrast to naturally formed diamond, which is created through geological processes ...
Types of metals include "gold, silver, copper, iron, lead, tin, nickel, zinc, aluminum, chromium, titanium, and their alloys". [22] Metal sculptures are prone to corrosion from air pollution and moisture in the air. [23] Interventive treatments for metals is an irreversible procedure that need consideration prior to work.
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