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Newest topics and users posts
28 Jan-16:52:58 Re: tucson shows 2022 (Bob Kerr)
28 Jan-14:52:52 Re: don lum collection (Don Lum)
28 Jan-14:41:04 Re: don lum collection (Carles Millan)
28 Jan-14:18:44 Re: tucson shows 2022 (Minsur)
28 Jan-13:46:21 Re: don lum collection (Don Lum)
28 Jan-13:42:13 Re: don lum collection (Bob Morgan)
28 Jan-10:16:43 Re: tucson shows 2022 (Bergur_e_sigurdarson)
28 Jan-09:52:10 Re: tucson shows 2022 (Jordi Fabre)
28 Jan-00:09:13 Re: don lum collection (Don Lum)
27 Jan-18:53:28 Re: collection of sante celiberti (Sante Celiberti)
27 Jan-18:07:20 Re: tucson shows 2022 (Bob Kerr)
27 Jan-17:13:53 Re: tucson shows 2022 (Bob Kerr)
27 Jan-16:47:57 Re: tucson shows 2022 (Bob Kerr)
27 Jan-16:33:00 Re: tucson shows 2022 (Bob Kerr)
27 Jan-16:22:17 Re: tucson shows 2022 (Bob Kerr)
27 Jan-16:04:48 Re: tucson shows 2022 (Bob Kerr)
27 Jan-15:04:20 Re: forms involved in titanite crystal (Josele)
27 Jan-14:20:21 Re: alleged 'silvers' from udokan? (Jordi Fabre)
27 Jan-14:17:25 Re: collection of michael shaw (Michael Shaw)
27 Jan-10:56:11 Re: tucson shows 2022 (Joseph Doliveira)
27 Jan-10:52:00 Re: tucson shows 2022 (John S. White)
27 Jan-10:06:30 Re: tucson shows 2022 (Minsur)
27 Jan-10:00:18 Re: forms involved in titanite crystal (Mark Holtkamp)
26 Jan-20:54:37 Re: tucson shows 2022 (Bob Kerr)
26 Jan-20:43:58 Re: tucson shows 2022 (Bob Kerr)

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  Topic: Looking for references for Emerald Mine Tours in Colombia
MSrockhound

Replies: 0
Views: 6234

PostForum: Rockhounding trips   Posted: Jan 17, 2017 19:22   Subject: Looking for references for Emerald Mine Tours in Colombia
Currently looking to book a tour of one of the emerald mining areas either Chivor or Muzo, this March. Currently I am having trouble finding tour groups or even a personal guided tour. Does anyone hav ...
  Topic: Corundum var. Sapphire and Ruby from same locality
MSrockhound

Replies: 10
Views: 15418

PostForum: Minerals and Mineralogy   Posted: Feb 24, 2014 12:25   Subject: Re: Corundum var. Sapphire and Ruby from same locality
Yes I agree about the quarts but the ruby specimen I hadn't had a chance to test yet and the white crystals were too small to see their habit without magnification. The sapphire is most definitely on ...
  Topic: Corundum var. Sapphire and Ruby from same locality
MSrockhound

Replies: 10
Views: 15418

PostForum: Minerals and Mineralogy   Posted: Feb 23, 2014 23:26   Subject: Corundum var. Sapphire and Ruby from same locality
At my local gem and mineral show this weekend I picked up two specimens of corundum labeled as being from Ilmen Mts, South Urals, Russia.

However, the sapphire appears to be on a feldspar matrix ...
  Topic: Strange Tourmaline formation containing a straw like channel
MSrockhound

Replies: 4
Views: 7557

PostForum: Minerals and Mineralogy   Posted: Jan 11, 2013 00:07   Subject: Strange Tourmaline formation containing a straw like channel
I was offered this specimen recently and was curious as to how it could have formed, how rare this is, and if this is something I should purchase before its too late. I enjoy having a few atypical spe ...
  Topic: Cation exchange capacity?
MSrockhound

Replies: 3
Views: 6324

PostForum: Off-Topic and Introductions   Posted: Dec 04, 2011 03:06   Subject: Re: Cation exchange capacity?
Thank you so much! I was confused looking at diagrams of CEC of kaolinite and montmorillonite but you have have put it in terms much easier for me to relate to a particular problem on my eng geo final ...
  Topic: Cation exchange capacity?
MSrockhound

Replies: 3
Views: 6324

PostForum: Off-Topic and Introductions   Posted: Dec 04, 2011 00:49   Subject: Cation exchange capacity?
Why do high values of cation exhange capacity cause engineering problems? high values in things like montmorillonite would swell less than those of kaolinite, with its low exchange capacity, so why it ...
  Topic: Cleaning Quartz
MSrockhound

Replies: 14
Views: 34926

PostForum: Conserving, Preparing and Cleaning Minerals   Posted: Oct 20, 2008 21:53   Subject: Cleaning Quartz
How can I clean this quartz of what appears to be rust buildup? I want it to be clean but I don't want to ruin the crystals.
 
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