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2. Turquoise - Wikipedia

   en.wikipedia.org/wiki/Turquoise

   Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 8 ·4H 2 O.It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.

3. Turquoise (color) - Wikipedia

   en.wikipedia.org/wiki/Turquoise_(color)

   The turquoise gemstone is the namesake for the color. Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 (P O 4) 4 (OH) 8 ·4H 2 O. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique ...

4. Tanzanite - Wikipedia

   en.wikipedia.org/wiki/Tanzanite

   Clarity grading in coloured gemstones is based on the eye-clean standard, that is, a gem is considered flawless if no inclusions are visible with the unaided eye (assuming 20/20 vision). [29] The Gemological Institute of America classifies tanzanite as a Type I gemstone, meaning it is normally eye-clean.

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

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

   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 ...

6. Agate - Wikipedia

   en.wikipedia.org/wiki/Agate

   Agate (/ ˈ æ ɡ ɪ t / AG-it) is a variety of chalcedony, [1] which comes in a wide variety of colors. Agates are primarily formed within volcanic and metamorphic rocks.The ornamental use of agate was common in ancient Greece, in assorted jewelry and in the seal stones of Greek warriors, [2] while bead necklaces with pierced and polished agate date back to the 3rd millennium BCE in the Indus ...

7. AOL

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   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

8. What's real and what's fake? In the Native art world, the ...

   www.aol.com/whats-real-whats-fake-native...

   Unlike Slim and Gorman, Denise Rosales has spent her life making and selling beadwork and other art. “My grandma took me to roadside stands, where I sat on a blanket making jewelry,” said ...

9. Variscite - Wikipedia

   en.wikipedia.org/wiki/Variscite

   Variscite has been used in Europe to make personal ornaments, especially beads, since Neolithic times. Its use continued during the Bronze Age and in Roman times although it was not until the 19th century that it was determined that all variscite used in Europe came from three sites in Spain, Gavá (Barcelona), Palazuelo de las Cuevas (Zamora), and Encinasola (Huelva).