* Sodalite >

Sodalite is a blue gemstone almost always veined with white streaks or markings. Its ideal color is an intense blue, and it comes in many shades of blue from light blue to deep royal-blue, and from grayish-blue to violet. Often different shades of blue will be present in a single gemstone. Sodalite is an opaque gemstone.

 


* Spessartite >

Spessartite is an orange to orange-red form of the gemstone Garnet.Spessartite is synonymous with Spessartine, though in the gem market  the name Spessartite is more frequently used, and in the mineral market the term Spessartine is more frequently used. The term Spessartite is often identified together with the Garnet name and called Spessartine Garnet in the trade. Major Spessartite deposits are in Tanzania, Kenya, Nigeria, Namibia, Mozambique, Pakistan, Afghanistan, China, Brazil, and the U.S.

 


* Spinel >

The “Ruby” that forms the centerpiece of the royal crown of England was actually determined to be Spinel.


* Spodumene >

Spodumene is a mineral that contains two important gem varieties: pink Kunzite and green Hiddenite. In the gem trade, the term Spodumene is generally used to include only the yellow, brownish, light greenish, and colorless forms of Spodumene.

 


* Sulfur >

Pure Sulfur is bright yellow. The color may be altered if impurities are present. Clay and selenium impurities, as well as volcanic mixtures in sulfur can cause it to be slightly red, green, brown, or gray. Sulfur often occurs in petroleum deposits, where it is found coated with greasy black petroleum.


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