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The Bigelow-Hartford Carpet Mills Historic District encompasses a company-built factory and residential area in the Thompsonville area of Enfield, Connecticut, United States. In addition to the former factory buildings of the Bigelow-Hartford Carpet Mills, it includes more than 150 housing units built by the company between about 1830 and 1920.
^ 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 Gemological Institute of America ( GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. [ 1] Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.
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 ...
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 ...
The Hadlyme North Historic District is an 81-acre (33 ha) historic district located in the southwest corner of the town of East Haddam, Connecticut (just north of the town line with Lyme ). It represents the historic core of the village of Hadlyme, which straddles the town line, and consists primarily of two north-south roads, Town Street ...
The Enfield Historic District encompasses a two-mile stretch of Enfield Street, the main north-south road of Enfield, Connecticut. Centered on the town common with its church and old town hall, it includes a diversity of residential architecture from the 18th to early 20th centuries. The district was listed on the National Register of Historic ...
The Colebrook Center Historic District encompasses the town center of Colebrook, Connecticut. Located in an isolated valley at the junction of Connecticut Route 183 with Rockwell and Smith Hill Roads, the village was established in 1767, and has seen little change since about 1860. It was listed on the National Register of Historic Places in 1991.