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Thanks Dud. I have both white and black scratch plates, but haven’t seen them since the move 1.5 years ago. They’re in the basement somewhere. As for hardness tests, I’ll also use one rock to

Cool. the points are what I use and back in 2013 did XRF on the different metals used in them. Some of that is posted as an early topics XRF group.Geo.

Geo, Almost anything will scratch calcite so that’s easy to weed out. Mohs hardness testers fall into 2 categories cheap and pricey. The cheap are a set of rocks of known hardness, the pricey are a

" and a hardness (7) much greater than calcite indicates quartz." What method used for hardness testing Dud? Geo To: [email protected], "DFEMER" <dfemer@...> Sent: Monday, November 30, 2020 9:50:41 AM

Hi Dud, Thanks for the very extensive analyses and interpretation of the results. Your latest round of assessment validates our earlier assumption that the white matrix was actually comprised of two

Ken, The second set of Non-Red "calcite " pieces you sent me are turned out to be quartz not calcite although they do look pretty much the same. Attached are the XRF, optical, reflectance and assay

Good thanks. Now I have something to work with. The gun shows a 6.55:1 ratio of Y to Pr while the ICP-MS shows right around 10:1 Good show. Geo

Geo, Attached are the XRF runs on Persson's #15 powdered bag sample labeled Yt+HREE Fluorite from the White Cloud Pegmatite South Platte CO. The powder is remarkably high in the LREE and HREE with

Same sample and detector system, now mounted on tube-type exciter. 50kvP @ various low microamps The results, in only seconds or a few minutes.,.mca attached. Besides the obvious there are several

The sample- The setup- Amptek SDD-1-2-3 MCA, GEOelectronics SDDCAP exciter AmX8 The results (.mca file attached). More to follow using tube exciter. Geo

Neat. I had nighttime pictures from the Mt. Pass mine (we camped just below the mine at the time) looking both east and west from the mine. I-15 was well defined by the head and tail lights of the

Dave, I can run that for you. I also have some Mt Pass White Earth Concentrate. I had some REE claims just across the border in Nv and I could look over at Mt Pass mine from there. It would be

Absolutely yes, Geo. Dud did a fantastic job! Ken Sent: Monday, November 23, 2020 05:03 PM To: [email protected] Subject: Re: [XRF] Ken Sejkora Red Phosphorescent Calcite That's a class act Dud. Geo>K0FF

Hi Dud, Thanks for the very extensive set of analyses you performed, and the comprehensive interpretation of the results. Yes, the presence of yttrium surprises me as well. Given that this is parking

Has anyone run a high-res XRF analysis of the ore material from the Mountain Pass mine (along I-15 in California on the way to Lost Wages and about 15 miles inside California)? It used to be the free

That's a class act Dud. Geo>K0FF To: [email protected] Sent: Monday, November 23, 2020 3:23:45 PM Subject: [XRF] Ken Sejkora Red Phosphorescent Calcite Ken, Attached are the XRF, optical, reflectance and

Ken, Attached are the XRF, optical, reflectance and assay runs on the parking lot calcite pieces you sent me.. The optical spectra shows a center wavelength at 610 nm (orange-red) with a pronounced

Yes, some materials require it, a cellulose wax type material is generally used. Pellets are generally used in automated xrf machines and the pellet must be strong enough so it doesn’t fall in to or

Dud, do they suggest mixing an organic binder in the powder before pressing? Geo To: [email protected] Sent: Thursday, November 19, 2020 9:44:35 PM Subject: Re: [XRF] Rubidium Ore (New Mexico) XRF Taray,

Dude Thanks for the explanation . Home non destructive xrf has its own beauty? Seeing elements reacting in a??natural state when exposed to an exciter? M.S. Shackley Mass absorption effects result