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^ 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 ...
The Graniteville Historic District of Westford, Massachusetts, United States, encompasses one of the town's historic 19th century industrial villages.The area was, until the arrival of the railroad in 1847, primarily known for its granite quarries.
Download QR code; Print/export ... Fletcher Granite Company is a granite quarry that opened in 1881 in Westford, Massachusetts. History
A block of granite in 2017 from the Fletcher Granite Company. The granite is described as a light gray or light pinkish-gray to a medium, slightly pinkish or pinkish and greenish-gray biotite granite with spots from 0.2 to 0.5 inches (5.1 to 12.7 mm) across and in some cases tapering out to 1 inch (25 mm) in length. [1]
A highly sought after variety of gem garnet is the fine green Grossular garnet from Kenya and Tanzania called tsavorite. This garnet was discovered in the 1960s in the Tsavo area of Kenya, from which the gem takes its name. Viluite is a variety name of grossular; that is not a recognized mineral species. [6]
A-type granite is a particular category of the S-I-A-M or 'alphabet' system which classifies granitoids and granitic rock by their photoliths or source. [1] [2] The 'A' stands for Anorogenic or Anhydrous, as these granites are characterized by low water content and a lack of orogenic or transitional tectonic fabric. [3]
The reservation is notable for its .25-mile-long (400 m), 70-foot-deep (21 m) chasm in granite bedrock with abrupt precipices and caves. Various theories have been proposed to account for the creation of the chasm. According to one source, it was created when glacial meltwater ripped out bedrock at the end of the last Ice Age.
Bahia Emerald [2]; Carolina Emperor, [3] [4] 310 carats uncut, 64.8 carats cut; discovered in the United States in 2009, resides in the North Carolina Museum of Natural Sciences, Raleigh, NC, US