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Gold/Mining/Energy : Canadian Diamond Play Cafi -- Ignore unavailable to you. Want to Upgrade?

To: Rocket Red who wrote (16143)	5/12/2023 8:47:12 AM
From: Rocket Red	Read Replies (1) \| Respond to of 16203

The diamond-bearing material at first excavated was a crumbling yellowish earth, which at a depth of about 50 feet became harder and darker, finally acquiring a slaty blue or dark green colour and a greasy feel, resembling certain varieties of serpentine. This is the well-known “blue ground” of the diamond miners. It is exposed to the sun for a short time, when it readily disintegrates, and is then washed for its diamonds. This “blue ground” has now been penetrated to a depth of 600 feet, and is found to become harder and more rock-like as the depth increases. The diamond-bearing portions often contain so many inclusions of shale as to resemble a breccia, and thus the lava passes by degrees into tuff or volcanic ash, which is also rich in diamonds, and is more readily decomposable than the denser lava.