Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Gold/Mining/Energy : Trump's 12 Diamond Picks, Discussions Limited -- Ignore unavailable to you. Want to Upgrade?

To: George J. Tromp who wrote (941)	6/20/1998 8:55:00 AM
From: Gabriela Neri	Respond to of 2251

George, Screen size decision for DeBeers(the use of 1mm by 1mm) was chosen due to the use of RC drill breakage. Stones would have been crushed with the drills, therefore a smaller screen size is needed to capture the fragments so that they can attempt to put them back together. This process requires a bit more time as it is quite tedious. A larger screen size now would not have captured all the fragments which may have been created from the drills. Jan Vandersande tell me that based upon his plotting of the weight distributions, it is quite apparent to him that significant breakage did occur. Winspear did not use RC or even core drills. It used shovels.

To: George J. Tromp who wrote (941)	6/20/1998 10:14:00 AM
From: Chas.	Read Replies (1) \| Respond to of 2251

Hi George...... Keep in mind also that a good percentage of the sample that Winspear tested contained approximately 10% +Granite or wall material that they were unable to separate in the field.....so...the posted grade is a touch better than what has been reported. The bulk of the sample was dynamited loose and bagged by hand.......rumour has it that 3 of the bagger guys have since retired from "Blasters r us" seems that it was a particularly rewarding job......chuck

To: George J. Tromp who wrote (941)	6/20/1998 1:38:00 PM
From: Tomato	Read Replies (1) \| Respond to of 2251

George, Could you respond to Gabi's comments about the RC drilling vs. the WSP blast and shovel technique, and whether the drilling breaks a significant number of large stones or not? I picture the RC drilling crating a tight core and don't understand how any diamonds could be broken other than those that are at the edges of the drill core, but I confess I don't know how the RC drilling mechanics work. If RC drilling breaks a lot of diamonds, what percentage do they break? Does anyone really know? You think it makes much difference? TIA