This less known mine in Asturias has been active for some decades but it has never been a prolific mine in quality specimens. Therefore, good specimens from Jaimina Mine are highly sought after by fluorite collectors, especially by those who already have specimens from the most common localities in Asturias such as Berbes, Emilio Mine, La Viesca (La Collada), La Moscona, etc.
This update comprises eleven specimens and seven of them are from the same pocket. This very small pocket, which I call “The Hidden Pocket”, yielded very few specimens, but they delight us with a crystal quality rarely seen in this mine. In its size these are top quality specimens for the locality: they just glow like gems! These excepcionally gemmy modified cubes (tetrahexahedron) are mostly water clear, just a hint of light blue in a few specimens. Some of them are associated with white barite blades and you can see nice sulphide inclusions in a few of them. Please enlarge the photos to fully appreciate the awesome crystal patterns of these specimens!
The Hidden Pocket was overlooked for a long time until an astute miner started to dig out white fluorite sand (just like sugar!) out of a very small cavity. He was getting rid of the white sand and in the process recovering these fantastic specimens. All specimens collected were completely floaters with no point of attachment to the limestone walls. The white fine sand surrounding each specimen helped to preserve those in pristine condition!
Apart from this pocket and to give a bit of variety, we also include four older specimens from different pockets that also deserve a good look.
Hey, spanish fluorite might be the best one in the world. Or maybe it’s not. It depends on what you like, really. If you like this, then it definitely is. If you like something a bit octahedral, then you probably won’t like this at all. But whatever.
From time to time, I listen to heated discussions among mineral collectors about why common mineral species like fluorite, quartz or calcite can be so highly valued. Among the previously cited minerals, fluorite is the one which produces more buzz by far.
Fine fluorite specimens have fetched extremely high prices during the last years. Indeed, they have sometimes surpassed in price to “elite minerals” like tourmalines or beryls. Are they worth that much?
Yesterday I went for a swim nearby, here in Perth, and I grabbed the first Mineralogical Record I saw in my home to take it with me. It was the special number called “Mineral Collections in Texas”, a beautiful one indeed! Well, I made some numbers based on the mineral species represented in each collection and I found some pretty amazing results: approximately 80% of the mineral collectors represented fluorite specimens among their minerals! Out of 44 collectors who appear on the magazine only two did not display any fluorite, quartz, calcite or baryte specimens. Why I am saying all this?
The importance of aesthetics in mineral specimens is gaining momentum every year and prices are less influenced by the mineral specie. It is a fact that a greater number of aesthetically oriented mineral collectors are entering the fine mineral specimen market. Many are knowledgeable about the rarity and properties of each specie but aesthetics are of paramount importance for them.
A widely distributed mineral has more chances to be form by earth as an aesthetic fine mineral.
Fine mineral collectors/dealers don’t value specimens per carat or gram. It is true that we have some similarities to what gem collectors value as transparency, color intensity, etc. But we have a big and important difference from gem related people: we pay for aesthetics, balance, composition, call it whatever you want, you know what I mean.
I would dare to say that is more difficult to assess the value of a fine mineral specimen than the one of a gem. To pick the best fine minerals among hundreds of them you need a much trained eye for aesthetics. You can tell me: “Juan, aesthetics are very subjective!” Ok, but there are certain parameters which are universal.
People used to name minerals like tourmaline or beryl like species which have to be more expensive than common ones. Are we buying our fine minerals to make rings or necklaces? Of course not! Which is the main difference between those elite minerals and fluorite? Hardness. Tourmaline is 7 and fluorite is 4 in the scale of Mohs. Apart from mineral hardness, let’s compare some “elite species” against fluorite.
Fluorite endures the war against tourmaline or beryl and I think it wins a few very important battles:
Color: dead heat between fluorite and tourmaline! Maybe beryl is behind because the rarity of different colors in the same crystal.
Luster: dead heat!
Transparency: dead heat!
Size: maybe fluorite wins.
Aesthetics: dead heat!
Crystal form: fluorite clearly wins for its remarkable multitude of crystal forms.
Association: fluorite wins, absolutely. Fluorite is not only a pegmatite mineral.
If you are thinking I have not kept in mind rarity as another important factor, let me say that nowadays with Pakistan, Afghanistan, Brazil, etc. as big sources for these “elite minerals”, they are not anymore rare (mediocre specimens are going quite cheap nowadays!) Anyone can buy average fluorites and just exactly the same stands for nice tourmalines or beryls. Moreover, I would say, truly aesthetic, top quality mineral specimens are always very rare to find, regardless the mineral specie we are talking about.
In my opinion only fluorite confronts the big names of tourmaline or beryl. Other extremely beautiful and highly priced minerals like pyromorphite or rodocrosite loose important battles like color variation, transparency or size. Or I have missed a blue rodo and a transparent large cabinet sized pyro crystal!?
As the Extra Lapis Fluorite (by editors Jesse Fisher, Miranda Jarnot, Günther Neumeier, Arvid Pasto, Gloria Staebler and Tom Wilson) says in its cover page:
To members and friends of the Mineralogical Society of Western Australia:
You are invited to come along for the MinSocWA SWAP-SELL Day Sunday 12th April.
Come along to swap / buy / sell anything related to mineralogy – geology or mining.
Mineral specimens, books, photos, magazines, field equipment, optical instruments, goniometers, crystal models, etc
As always, we will have the MinSocWA microscope and UV lamp available should you wish to examine a specimen more closely.
When: Sunday 12th April 2015 from 10 AM to 3 PM
Where: premises of WA Lapidary + Rockhunting Club at 31 Gladstone Road, Rivervale, Perth.
Cost: $2 door charge applies
帕纳什凯拉矿（葡萄牙）的开采始源于1898年，最早可以追溯于罗马人和之后的摩尔人对锡的挖掘。Beralt Tin and Wolfram, Ltd （一家英国公司）在1927年获得了这里的采矿权。如今帕纳什凯拉是世界做大的钨矿之一，并且在日本Soj i t z 公司下运营。帕纳什凯拉矿区有很多矿山，Corga Seca, Barroca Grande, Panas quei ra, Vale da Ermida和一些较小的。有一些很多年前就已经关闭，比如Vale da Ermida，这个矿山最后为帕纳什凯拉矿区历史贡献了一些很好的矿物学例子。
The largest and most important mineral fair in Europe is about to start! Yes, The Munich Mineral Fair is going to be held this week. Friday the 24th of October is the day for registered buyers and during the weekend it is open for everyone. This year the theme will be meteorites but,as every year, you will find there gems, stones, fossils and of course mineral specimens!
Those above are the main themes but there will be some booths offering mining parafernalia, antique books or tools for crystal hunting among other things. For example, Jörgen Langhof from NHM in Stockholm and Johan Kjellman, will have a small exhibit on old crystal models at M34-M35 in Hall A5.
This year I will miss the show but anyone interested in sharing some photos about the Munich Show 2014 is more than welcome to do it.