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Ada is a city in and the county seat of Pontotoc County, Oklahoma, United States. [ 4] The population was 16,481 at the 2020 United States Census. The city was named for Ada Reed, the daughter of an early settler, and was incorporated in 1901. [ 5] Ada is home to East Central University, and is the capital of the Chickasaw Nation.
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
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.
89001950 [1] Added to NRHP. November 13, 1989. The Ada Arts and Heritage Center is a Colonial Revival styled building located at 400 South Rennie Street in Ada, Oklahoma. The building was listed on the National Register of Historic Places as Ada Public Library in 1989. [1] The building was built in 1939 to serve as the public library of Ada.
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]
BC Clark Jewelers is a full-service jeweler that currently operates three stores in Oklahoma City, Oklahoma. The company, founded in Purcell, Indian Territory in 1892, claims to be "Oklahoma's oldest jeweler." [1] Today, the company operates three locations in Oklahoma City. BC Clark is most well-known for its iconic "Anniversary Sale" jingle ...
2) How to identify color, color grading systems, color on an LCD screen (internet sales), role of (day-)light, lighting in jewelry store etc. 3) Kimberley process: yes/no functioning; 4) Patriot act and Homeland Security affecting jewelry/gem industry (import the top ruby from Burma which has a boycott against it from the USA e.g.