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would you say that these stones indicate diamonds in my area? i am located nea a volcano.

Dear Wormi, Goodmorning and Fraternal Greetings!

Diamonds are available in different geological terrains, for example Kimberlite areas, placer deposits and also alluvial deposits
A Diamond is formed when extreme heat (temperatures of 2200 degrees Fahrenheit) and extreme pressure cause carbon atoms to crystallize forming diamonds approximately ninety miles under the earth's surface. Diamonds reach the surface of the earth via volcanic pipes or via placer / alluvial deposits. Kimberlite is a blue rock that occurs in ancient volcanic pipes and is the most common host of diamonds. When a volcano erupts diamonds are also deposited on, or near, the surface. Some of the kimberlite host rock is washed away by streams and rivers and diamonds are deposited as sediment in the stream sands in 'placer deposits' also called Alluvial deposits. These deposits are caused by volcanic eruptions or by millions of years of erosion caused by rainfall and snow-melt which unearth the diamonds from their kimberlite source. So, in answer to the question where are diamonds found - areas where there have been volcanic activity or erosion and where natural elements such as streams, rivers and even glaciers might have taken them.

Hence we have to study the area first, then we can come to a conclusion. whatever you have shown in the hand may be probably indicate the availability of Diamonds.

with regards

Dr D S Subrahmanyam


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Dr D S Subrahmanyam


All questions related to Geology, Geotechnical Engineering (especially in-situ stress, in-situ Deformability and Shear investigations) required for underground tunnels and excavations, Dimensional Stone Mining. Can't answer Soil dynamics related to Geotechnical Engineering


Geology and Geotechnical Engineering and Dimensional Stone Mining

National Institute of Rock Mechanics (Govt of India)

International Journal of Mining Engineering and some other Indian journals

Doctorate in Geology

Awards and Honors
Reviewer for 3 International Journals

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