Western Colorado Rock ID - Colorado Prospector - Gem and mineral prospecting and mining forums

Colorado Prospector - Gem and mineral prospecting and mining forums > Prospecting, Mineral Collecting and Treasure Hunting Forums > Gem and Mineral Specimen Finds or Processes

Western Colorado Rock ID

Options

Flapjacks

May 10 2018, 12:31 PM

Post #1

Observer

Group: Members
Posts: 2
Joined: 10-May 18
Member No.: 143,583

I found this in Mesa County, associated with a mudstone formation. I don't know rocks too well, but it seems like a chert sandwich. Seems kind of familiar, like I may have seen something
like this outside of Colorado.

Anyone know for certain what this is and possibly some geological insight on such a formation?

Thanks for any help!

Replies

Clay Diggins View Member Profile	May 14 2018, 09:03 AM Post #2
Shovel Buster! Group: Members Posts: 107 Joined: 23-September 14 Member No.: 118,169	Hard to tell from a picture but it looks like Calcite. Have you done streak and hardness tests?

Posts in this topic

Flapjacks Western Colorado Rock ID May 10 2018, 12:31 PM

Clay Diggins Hard to tell from a picture but it looks like Calc... May 14 2018, 09:03 AM

Flapjacks QUOTE (Clay Diggins @ May 14 2018, 10:03 ... May 14 2018, 12:12 PM

« Next Oldest · Gem and Mineral Specimen Finds or Processes · Next Newest »

1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)

0 Members:

Display Mode: Switch to: Standard · Switch to: Linear+ · Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

Lo-Fi Version

Time is now: 18th July 2025 - 06:24 AM