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18 May-07:47:40 Re: collection of jean suffert (Jean Suffert)
18 May-06:38:36 Re: collection of sante celiberti (Sante Celiberti)
18 May-01:01:56 Re: morocco, light, shape and colour - (36) (Tobi)
18 May-00:54:24 Re: collection of sante celiberti (Tobi)
18 May-00:02:52 Re: what is this? (Steveb)
17 May-17:02:04 The mizunaka collection - rhodochrosite (Am Mizunaka)
17 May-09:56:17 Re: what is this? (Bob Harman)
17 May-09:37:31 What is this? (Lyoung266)
17 May-05:10:07 Re: fósseis (James Catmur)
17 May-04:37:35 Re: fósseis (Peter Lemkin)
17 May-04:14:26 Re: fósseis (Luiz Oliveira)
17 May-00:27:44 Re: fósseis (James Catmur)
16 May-18:14:43 Fósseis (Luiz Oliveira)
16 May-17:06:42 Re: collection of sante celiberti (Sante Celiberti)
16 May-12:46:21 Re: don lum collection (Don Lum)
16 May-09:08:34 Re: favourite barytes? (Bob Harman)
16 May-08:44:46 Re: collection of michael shaw (Michael Shaw)
16 May-08:44:07 Re: is this still quartz?? (Bob Harman)
16 May-08:19:49 Re: is this still quartz?? (Bob Harman)
15 May-22:52:09 Re: is this still quartz?? (Ken)
15 May-17:46:07 Re: don lum collection (Don Lum)
15 May-13:37:24 Re: morocco, light, shape and colour - (36) (Fmf Forum)
15 May-11:57:37 Re: collection of volkmar stingl (Volkmar Stingl)
14 May-23:17:51 The mizunaka collection - villiaumite (Am Mizunaka)
14 May-19:36:49 Re: is this still quartz?? (Steveb)

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Collection of Tobi
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Tobi




Joined: 07 Apr 2009
Posts: 3580
Location: Good Old Germany


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PostPosted: Apr 13, 2021 03:44    Post subject: Re: Collection of Tobi  

jose luis jara jara wrote:
Tobi wrote:
The newest addition means really something special to me. Since my interest in minerals began as a child (30 years ago) and I read some mineral books for the first time, I dreamed of once having an Australian precious opal. This was maybe my first mineral desire, long before I even developed knowledge and preferences for that hobby; it was rather love at first sight ;-) I think many people feel some "magic" when they first see the surreal colour play of a good opal; and back in the early 90s, 8 or 9 year old Tobi was mesmerized by those "magical" rocks from the Australian outback. Knowing that good specimens from Australia are quite expensive, I never really expected to find a nice and larger specimen for me, but now I could finally fulfill that desire I had for 30 years and I'm really really happy to add that beautiful specimen to my collection:
What a beautiful opal, is the black opal variety?
Hi Jose, no, the so-called black opal is one with a darker base colour (mostly deep blue), this one here is what is called boulder opal, the typical variety with a brighter base colour (grey to pale blue) and grown in brown matrix. I'm glad you like it :-)

Carles Millan wrote:
Tobi wrote:
Common stuff, but a quite large and impressive specimen:
An uncommon association with a very nice color contrast. Good choice!
Hi Carles, thank you. Not really uncommon, the deposits in Rio Grande do Sul (e.g. Ametista do Sul or Iraí) produce masses of calcite/amethyst specimens. But nonetheless some of them are really good material and I like this one for its size and shape with that large calcite cluster on top :-)

The next specimen is a true highlight for me, a large and awesome combination of fluorite and calcite from China:



HunaFLUO.jpg
 Mineral: Fluorite, Calcite
 Locality:
Xianghualing Mine, Xianghualing Sn-polymetallic ore field, Linwu, Chenzhou Prefecture, Hunan Province, China
 Dimensions: Specimen height 18 cm, largest fluorite 3,5 cm, largest calcite 5 cm
 Description:
Photo © Saphira Minerals
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HunaFLUO.jpg


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Tobi




Joined: 07 Apr 2009
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PostPosted: Apr 25, 2021 07:55    Post subject: Re: Collection of Tobi  

An older specimen that I improved by trimming some matrix. Actually something I don't do that often because of the risk to damage a specimen, but that matrix here was quite easy to work with. I hope the result is ok.


AfghLASU2.JPG
 Mineral: Lazurite
 Locality:
Ladjuar Medam, Sar-e Sang, Koksha Valley, Khash & Kuran Wa Munjan Districts, Badakhshan Province, Afghanistan
 Dimensions: Specimen size 7 cm
 Description:
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AfghLASU2.JPG


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