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2. List of U.S. state minerals, rocks, stones and gemstones

   en.wikipedia.org/wiki/List_of_U.S._state...

   ^ Florida's state gem, moonstone, was adopted to highlight Florida's role in the United States' Lunar program, which landed the first astronauts on the Moon. [81] ^ Since 1983, Massachusetts has had 3 other official state rocks: State Historical Rock (Plymouth Rock), State Explorer Rock (Dighton Rock), and State Building and Monument Stone . In ...

3. Diamond (gemstone) - Wikipedia

   en.wikipedia.org/wiki/Diamond_(gemstone)

   Diamond[ a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...

4. Hope Diamond - Wikipedia

   en.wikipedia.org/wiki/Hope_Diamond

   Estimated value. US$200–350 million. The Hope Diamond is a 45.52 carats (9.104 g; 0.3211 oz) diamond that has been famed for its great size since the 18th century. Extracted in the 17th century from the Kollur Mine in Guntur, India, [ 1][ 2] the Hope Diamond is a blue diamond. Its exceptional size has revealed new information about the ...

5. Jack Roland Murphy - Wikipedia

   en.wikipedia.org/wiki/Jack_Roland_Murphy

   Jack Roland Murphy. Jack Roland Murphy (May 26, 1937 – September 12, 2020), known as " Murph the Surf " or " Murf the Surf ", was convicted of murder in 1969. He was also involved in the biggest jewel heist in American history, the 1964 burglary of the jewel collection of New York's American Museum of Natural History. [ 1]

6. Thimble Islands - Wikipedia

   en.wikipedia.org/wiki/Thimble_Islands

   Thimble Islands. The Thimble Islands is an archipelago consisting of small islands in Long Island Sound, located in and around the harbor of Stony Creek in the southeast corner of Branford, Connecticut. The islands are under the jurisdiction of the United States with security provided by the town of Branford police and the US Coast Guard.

7. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including ( clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...

8. Cut (gems) - Wikipedia

   en.wikipedia.org/wiki/Cut_(gems)

   Cut (gems) A decorative glass crystal about 4 cm (1.6 in) in diameter, having a facet cut often applied for gemstones. At some positions, coloured light (see rainbow colouring) can be regarded caused by the intended optical prism effect of the cut. A gemstone desired to be used in jewelry is cut depending on the size and shape of the rough ...

9. Gemology - Wikipedia

   en.wikipedia.org/wiki/Gemology

   Examining a pink sapphire under a gemmological microscope. Gemology or gemmology is the science dealing with natural and artificial gemstone materials. It is a specific interdisciplinary branch of mineralogy. Some jewelers (and many non-jewelers) are academically trained gemologists and are qualified to identify and evaluate gems. [ 1][ 2]