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Newest topics and users posts
04 Aug-05:50:34 Re: advice needed on how to get started on a potential project. (Peter Lemkin)
04 Aug-04:34:30 Advice needed on how to get started on a potential project. (Smurfstuff)
03 Aug-14:18:07 Re: tsumeb - deposit of dioptase on calcite. (Roger Warin)
03 Aug-13:05:21 Re: collection of volkmar stingl (Volkmar Stingl)
03 Aug-11:36:18 Re: tsumeb - deposit of dioptase on calcite. (Steveb)
03 Aug-10:56:32 Tsumeb - deposit of dioptase on calcite. (Roger Warin)
03 Aug-07:01:45 Re: stay at home - coronavirus / covid-19 (Peter Lemkin)
02 Aug-23:55:17 Re: collection of volkmar stingl (Volkmar Stingl)
02 Aug-23:11:49 Re: don lum collection (Don Lum)
02 Aug-10:20:30 Re: stay at home - coronavirus / covid-19 (Roger Warin)
02 Aug-09:15:31 Re: collection of michael shaw (Michael Shaw)
02 Aug-00:58:34 Re: stay at home - coronavirus / covid-19 (Peter Lemkin)
01 Aug-14:31:32 Re: stay at home - coronavirus / covid-19 (Don Lum)
01 Aug-14:24:20 Re: stay at home - coronavirus / covid-19 (Riccardo Modanesi)
01 Aug-14:21:52 Re: collection of sante celiberti (Jordi Fabre)
01 Aug-09:27:00 Re: corona covid-19 virus - what is it ? where is it from ? (Roger Warin)
01 Aug-07:15:53 Re: collection of volkmar stingl (Volkmar Stingl)
01 Aug-06:48:22 Re: corona covid-19 virus - what is it ? where is it from ? (Peter Lemkin)
01 Aug-04:45:19 Re: corona covid-19 virus - what is it ? where is it from ? (R Saunders)
31 Jul-22:40:40 Corona covid-19 virus - what is it ? where is it from ? (Roger Warin)
31 Jul-16:32:56 Re: collection of firmo espinar (Firmo Espinar)
30 Jul-14:58:22 Re: melanophlogite? (Luiz Oliveira)
30 Jul-14:51:23 Re: about a rutile epitaxy on hematite in quartz (Roger Warin)
30 Jul-03:36:43 The mizunaka collection - quartz (Am Mizunaka)
29 Jul-22:49:31 Re: collection of volkmar stingl (Volkmar Stingl)

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Author Message
  Topic: Is this Calcite or Dolomite
xdxucn

Replies: 8
Views: 2447

PostForum: What is it? - Where is it from?   Posted: Jul 31, 2020 22:42   Subject: Re: Is this Calcite or Dolomite
Thanks for the answer. Maybe I can do a little hardness test on the back corner side of the specimen. And I will let you know the result.

As for identification of similar samples, some says it's ca ...
  Topic: Is this Calcite or Dolomite
xdxucn

Replies: 8
Views: 2447

PostForum: What is it? - Where is it from?   Posted: Jul 29, 2020 23:26   Subject: Is this Calcite or Dolomite
I've got a piece of specimen, which said to be Galena+Calcite from Russia.

In Rock and Gem magazine, April 2017, there's an article "Is it Calcite or Dolomite". In the article, it says t ...
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 15, 2014 22:06   Subject: Re: Collection of Xiao-dong
Sharp phantom fluorite with glossy surface.
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 15, 2014 06:07   Subject: Re: Collection of Xiao-dong
An inner part of a rounded nodule of Blue John fluorite has been highly polished into a shallow dome revealing the fine banded structure of the fluorite within.
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 15, 2014 04:07   Subject: Re: Collection of Xiao-dong
Crystals of amethyst with great color.
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 15, 2014 00:06   Subject: Re: Collection of Xiao-dong
Beautiful cluster of Siderite crystals, like pinecones. There are little Pyrite crystals all over the surface.
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 13, 2014 10:36   Subject: Re: Collection of Xiao-dong
Yes Xiao, it is Chalcopyrite.
Thank you, Jordi.
I found that the Fluorite fluoresced pale yellow color under SW UV light.
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 13, 2014 07:23   Subject: Re: Collection of Xiao-dong
Transparent violet fluorite crystals with lustrous sphalerite. BTW, what's on the surface of fluorite? Are they little chalcopyrite crystals?
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 12, 2014 21:20   Subject: Re: Tutorial to do better photos of minerals by Xiao-dong
Hello Xiao!
A final question: Is the software "Topaz ReMask" suitable for all postprocessing photo-software, or is this a special add-on for Photoshop?
Martin

I think ReMask needs host ...
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 11, 2014 17:58   Subject: Re: Tutorial to do better photos of minerals by Xiao-dong
Here's another rough modification based on your first photo.

That specimen is a piece of slice. Usually I put slice pieces direct on the table (not standing) and take photos. So gradient backgroun ...
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 11, 2014 17:42   Subject: Re: Tutorial to do better photos of minerals by Xiao-dong
Hello Xiao!

A question: Is the soft shadow on the bottom of your specimens natural (made with lightning), or is it artificial (made with photoshop)?

I want to post here two photos from my collec ...
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 11, 2014 03:12   Subject: Re: Collection of Xiao-dong
Cute thumbnail of Benitoite. It fluoresces blue color under SW UV light.
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 10, 2014 14:50   Subject: Re: Tutorial to do better photos of minerals by Xiao-dong
Thank you Xiao. Can you please tell us what software, camera, and lights you use? Regards
1) Software and plugin:

The software I use is Photoshop, which is the most used photo retouching tool in t ...
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 10, 2014 04:12   Subject: Re: Tutorial to do better photos of minerals by Xiao-dong
If you trust your eyes, you can add more to the background:
1) remove imperfections in the background
2) add gradient to simulate a studio background
3) add some glow to make specimen more focused ...
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 10, 2014 03:56   Subject: Re: Tutorial to do better photos of minerals by Xiao-dong
Having no high-quality background paper (often happens to me)? No problem, you can blur background digitally, which remove all the imperfectness of background. The shadow is blurred, but we will not n ...
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 10, 2014 03:40   Subject: Re: Tutorial to do better photos of minerals by Xiao-dong
1) Black background is often used by most people. But it seems that the specimen has no relation with background.
2) Add a little glow behind specimen. Looks a little better, because it forces the ...
  Topic: Tutorial to do better photos of minerals by Xiao-dong
xdxucn

Replies: 15
Views: 31286

PostForum: Micros & Macros - Images of Minerals   Posted: Aug 10, 2014 03:26   Subject: Tutorial to do better photos of minerals by Xiao-dong
...I'm considering writing some brief tutorial on how to do this. It might take some time because English is not my native language. When it's finished, I'll put on the forum. :)...
Sounds wonderful! ...
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 09, 2014 00:05   Subject: Re: Collection of Xiao-dong
A thumbnail specimen of a cluster of Franklinite crystals, showing classic metallic lustre and octahedral form. The specimen is not perfect, but it is what I can get now. : )
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 03, 2014 07:23   Subject: Re: Collection of Xiao-dong
Those black dots add another beauty to the specimen.
  Topic: Collection of Xiao-dong
xdxucn

Replies: 104
Views: 94793

PostForum: Collection photos and Collector's page   Posted: Aug 02, 2014 18:53   Subject: Re: Collection of Xiao-dong
Hausmannite on Andradite

Silver with Acanthite: Thank FMF members for helping to identify the locality.
 
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