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Nope...sometimes it's gray, and the blue, or green in it is often just a shade, or tone. Also lamproite can be tan, or buff-colored as easy as gray/blue.As I understand it, Kimberlite is always blue, blue/green in color.
Nope...sometimes it's gray, and the blue, or green in it is often just a shade, or tone. Also lamproite can be tan, or buff-colored as easy as gray/blue.
Jim
Here's a nice 3.8 carat chunk of chromian diopside I found in Wyoming last summer. The gray stuck to it, here and there, is the kimberlite matrix that the CD came out of.I certainly can't dispute what you say. I have been in two Kimberlite Tube Areas and they were distinctly blue in color. One, the Crater of Diamonds State Park in Arkansas, I've been there several times. The other was in Utah but I can't recall the name of the area.
Here's a nice 3.8 carat chunk of chromian diopside I found in Wyoming last summer. The gray stuck to it, here and there, is the kimberlite matrix that the CD came out of.
View attachment 904971
Johnny, I sure wish you could remember where you were in Utah. There are diamonds there somewhere......probably near the southern ramparts of the Uintas. Maybe northwest of Vernal.
I think the pipe at Crater of Diamonds is lamproite, rather than kimberlite. There are actually a couple of different pipes there, very close together. That's why the soil they get the diamonds from has different colors.
Jim
Big diamond bearing area north of Fort Collins
The Kelsey Mine Area- Diamonds in Northern Colorado
This was about 25 years ago. I recall the Crater of Diamonds because I have been there four times over the years. The time in Utah, I was with a couple of friends that were into gem hunting. We were on a trip to Las Vegas (driving) and they stopped in Colorado for a couple of days. We went into the mountains gem hunting. Again, I do not recall where we were but it was an area not far off of Rte 80 and not too far from Denver. As I recall the area in Utah was also not very far off of Rte 80 but a good ways before you reach the Salt Lake City Area.
They/We did find some keeper gems/crystals in Colorado but nothing in Utah.