Q:

What is the world's rarest marble?

A:

There is no single world's rarest marble, as the collectible market is constantly changing. However, a single gather confetti mica marble described as ultra rare sold for $10,999 in 2009.

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Other rare marbles include sulfide marbles, which contain tiny porcelain figures and sell for $1000 each; glass German swirls from the 1930s, which sell for thousands of dollars in mint condition; and extremely rare pastoral china marbles, which sell for $10,000 or more. Other relatively rare marbles include German or American agate marbles, which sell for around $200 each; and glittery French Lutz marbles, which range from $100 for basic marbles to thousands for intricate designs.

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  • Q:

    What are some facts about marble?

    A:

    Marble is a metamorphic rock. This means that it was formed out of another rock after eons of heat and pressure. Marble is formed out of pure limestone.

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  • Q:

    What color is marble?

    A:

    White, grey, green, pink, beige and black are all naturally occurring colors of marble. However, marble is usually streaked and swirled with other secondary colors and is not typically one pure color.

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  • Q:

    How does marble form?

    A:

    Marble is a soft metamorphic rock that forms at the edges of tectonic plates, where limestone is exposed to regional metamorphism. The heat and pressure of the metamorphic zone force calcite inside the limestone to recrystallize and merge into the classic marble consistency.

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  • Q:

    What type of rock is marble?

    A:

    Marble belongs to the metamorphic group of rocks, which is one of the three primary types of rock-type groupings. The rock is created when limestone is subjected to high pressures and temperatures. The marble is formed because calcite materializes on the limestone, resulting in the creation of a more dense rock that contains roughly equigranular calcite crystals.

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