Calderite is a

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Mi ...

in the

garnet Garnets () are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. Garnet minerals, while sharing similar physical and crystallographic properties, exhibit a wide range of chemical compositions, de ...

group with the chemical formula ( Mn²⁺, Ca)₃( Fe³⁺, Al)₂( Si O₄)₃. It is dark reddish brown to dark yellowish in color and generally granular massive in form.Handbook of Mineralogy
/ref> It was named for geologist James Calder who worked on the geology of India. The name was first applied to a rock in manganese deposits in

Katkamsandi Katkamsandi is a village in the Katkamsandi CD block in the Hazaribagh Sadar subdivision of the Hazaribagh district in the Indian state of Jharkhand. Geography Location Katkamsandi is located at . Area overview Hazaribagh district is a pla ...

, Hazaribagh district,

Bihar Bihar ( ) is a states and union territories of India, state in Eastern India. It is the list of states and union territories of India by population, second largest state by population, the List of states and union territories of India by are ...

and at Netra, Balaghat district,

Madhya Pradesh Madhya Pradesh (; ; ) is a state in central India. Its capital is Bhopal and the largest city is Indore, Indore. Other major cities includes Gwalior, Jabalpur, and Sagar, Madhya Pradesh, Sagar. Madhya Pradesh is the List of states and union te ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

. later transferred to its predominant mineral. In 1909 it was described as a mineral from Otjosondu, Otjozondjupa Region,

Namibia Namibia, officially the Republic of Namibia, is a country on the west coast of Southern Africa. Its borders include the Atlantic Ocean to the west, Angola and Zambia to the north, Botswana to the east and South Africa to the south; in the no ...

References

Further reading