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Pocketmags Digital Magazines
US
Pocketmags Digital Magazines

Color In Minerals

ON THE ROCKS

Deep color and an unusual “opposed bar” style of cutting helps make this Russian Citrine a seriously fine example of this type of Quartz. HERITAGE AUCTIONS

Among the ninety plus chemical elements on the Periodic Table, the transition metal elements are the most fascinating. They play two major roles in the formation of minerals. They are the key metal element in the formation of a huge variety of collectible and colorful minerals acting as the cation in their mineral forming role. They are also the most active when found as a trace impurity giving gems and minerals their color. In that role, they are called chromophores.

Any atom that gains or loses an electron is called an ion. The term cation describes the positively charged atom or molecule in a chemical reaction. The opposite of a cation is the anion, a negatively charged atom or molecule.

Together they form a mineral. Since metal atoms in solutions tend to give up electrons, in a reaction they are normally positively charged cations. The opposite are anions that gain an electron in solution. For example, salt forms when sodium, the positively charged metal, joins chlorine the negatively charged atom. This action is called ionization. Salt water is a great conductor of electricity because of all the charged ions in the solution. The terms cation and anion are oThen used when describing a mineral’s chemistry.

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Beckett Rock & Gem July 2019, Aragonite & Ancients : Serving to Enhance Ammonites, Canadian Diamonds, Captivated By BirthStones, And More....