Minerals R - S


Red Quartz 

Location: Morocco, Brazil, Spain & more
This is quartz with hematite.
Variety of Quartz
Chemical Composition: SiO2 and Fe2O3
Hardness: 7



(also called raspberry spar or manganese spar)
Location: Argentina, South Africa, Peru, Montana, Russia, China, Gabon, Mexico, Japan, & more
Chemical Composition: MnCO3, Manganese Carbonate
Hardness: 3.5 - 4



Location: Madagascar, British Columbia, Russia, USA, Sweden
Chemical Composition: (Mn, Fe, Mg, Ca)SiO3 manganese silicate
Hardness: 5.5 - 6.5


Rose Quartz

Location: Brazil, Madagascar, USA, India & more
Light rose to a deep rose color
Variety of: Quartz
Chemical Composition: SiO2 
Hardness: 7



Location: Afghanistan, Australia, Cambodia, India, Madagascar, Malawi, Mozambique, Pakistan, Sri Lanka, Tanzania, Thailand, the United States, Vietnam & more
Variety of: Corundum
Chemical Composition: Al2O3
Hardness: 9



Location: Zambia, Tanzania, India
Chemical Composition of Zoisite: Ca2Al3(SiO4)3(OH), Calcium Aluminum Silicate Hydroxide
Hardness: 6 - 7


Rutilated Quartz

Location: Australia, Brazil, Kazakhstan, Madagascar, Norway, Pakistan and the United States
Variety of: Quartz
Quartz chemical composition: SiO2 
Rutile chemical composition: TiO2 
Hardness: quartz 7, rutile 6 to 6.5


Location: Australia, United States, South Africa, Germany
Chemical Composition:  Quartz/ Feldspar Silicates
Hardness: 6-7



Location:  Australia, Afghanistan, Cambodia, Cameroon, China (Shandong), Colombia, Ethiopia, India (Kashmir), Kenya, Laos, Madagascar, Malawi, Mozambique, Myanmar (Burma), Nigeria, Rwanda, Sri Lanka, Tanzania, Thailand, United States (Montana) and Vietnam
Chemical Composition:  Al203
Variety of: Corundum or aluminum oxide
Hardness: 9



Location:  Worldwide, Mexico, Poland, Russia, Greece, Japan, Australia, Argentina, Brazil and the United States
"Selenite" is the colorless and transparent variety of gypsum that shows a pearl like luster and has been described as having a moon like glow. The word selenite comes from the Greek word for Moon and means moon rock.
Chemical Composition: CaSO4-2(H2O), Hydrated Calcium Sulfate
Hardness: 2 and can be scratched by a fingernail



Location: Utah, Madagascar 
Chemical Composition: CaCO3
The inside gold colored crystals are calcite and the brown banding is iron calcite. The outer surface was originally mud which, over millions of years, hardened into rock



Location: Russia
Chemical Composition:  Carbon
Hardness: 3.5-4
A noncrystalline carbon with trace amounts of fullerenes



Smokey Quartz

Location: Brazil, Madagascar & more
Variety of: Quartz 
Chemical Compisition: SiO2
Hardness: 7



Location: Hunan province, China; on the island of Shikoku, Japan; and in the western United States (Idaho, California, and Nevada)
Chemical Composition: Sb2S3, Antimony Sulfide
Hardness: 2



Location: Africa, Canada, Liguria and Tuscany, Italy; New South Wales, Australia and Madhya Pradesh, India.
Chemical Composition: KNa2Li3(Fe, Mn, Al)2Si12O30, Potassium Sodium Lithium Iron Manganese Aluminum Silicate
Hardness: 6 - 6.5



Location: Worldwide, Bolivia
Translucent resinous yellow
Chemical Composition: S , Elemental Sulfur
Hardness: 2