A general guide for using the Forum with some rules and tips
The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
|
Search found 994 matches |
Author | Message |
---|---|
![]() |
|
Roger Warin Replies: 4 Views: 594 |
![]() |
Hannut Show (about 50 km west of Liege): 2023, 03 5.
1st show after winter in Wallonia. It is held on 1 single day. Never, the public attendance was so important. Admission price = € 0. Price per ... |
|
![]() |
|
Roger Warin Replies: 22 Views: 1835 |
![]() |
"La Poste" was on strike in Belgium today.
Too many parcels and there are no more letters. The postman no longer has time to drink a little drop of whiskey. |
|
![]() |
|
Roger Warin Replies: 22 Views: 1835 |
![]() |
Hello,
This discussion gives me the opportunity to thank the editor. I offer my congratulations on the honoring of commitments. During its youth, the Mineralogical Record apparently experienced som ... |
|
![]() |
|
Roger Warin Replies: 17 Views: 1356 |
![]() |
Hello,
I believe that fluorite and quartz differentiation tests are easy to perform. There are at Richelle (Liege-B), some quartz crystals whose habit is pseudo-cubic. This occurs when the rhombohe ... |
|
![]() |
|
Roger Warin Replies: 9 Views: 771 |
![]() |
Precisely, gold is a very special case.
What is the origin of the formation of nuggets? I think that a quantity of gold escaped the migration to the core of the planet because it was not in a metall ... |
|
![]() |
|
Roger Warin Replies: 9 Views: 771 |
![]() |
Hello Alfredo,
In this case, IMA does not recognize the species, I think. I believe the Madagascar pezzottaite was only found in one cavity. 1 thousand specimens? Exhausted today? It seems to me t ... |
|
![]() |
|
Roger Warin Replies: 1 Views: 458 |
![]() |
Hello,
I bought this little elbaite crystal in Munich in 1983. Pala is the imprecise origin given by the seller. Is it plausible? |
|
![]() |
|
Roger Warin Replies: 19 Views: 2445 |
![]() |
Hello,
Paraphrasing the words of Pete Richards, I would say that all chemistry and biochemistry obey these laws: I find the shapes of crystals to be among the most elegant manifestations of the self ... |
|
![]() |
|
Roger Warin Replies: 19 Views: 2445 |
![]() |
Hello,
I warmly thank Bob Kerr for pulling a magnificent specimen out of his conjurer's hat. Having spent my life as a researcher-teacher (chemistry), I have often explored borders to understand Nat ... |
|
![]() |
|
Roger Warin Replies: 19 Views: 2445 |
![]() |
For me, the head of the crystal is not rough but demonstrative.
This is still fast growing because edges grow faster than faces. The Mercedes Cross highlights the ternary c axis of the tourmaline. ... |
|
![]() |
|
Roger Warin Replies: 19 Views: 2445 |
![]() |
Hello,
This comment helps me too. Because we know (although it still surprises me) that the crystallization of pegmatite minerals is very fast. The unit of the abscissa axis giving the growth rate ... |
|
![]() |
|
Roger Warin Replies: 19 Views: 2445 |
![]() |
Yes, I agree.
But we must take into account the kinetics of growth. The smallest Miller index faces are those with the highest reticular densities (highest atom densities) and are therefore those th ... |
|
![]() |
|
Roger Warin Replies: 19 Views: 2445 |
![]() |
Hello,
In Schorl, there is no pinacoid (2 parallel faces) but 2 pedions (single face) because there is no center of symmetry in the crystal. The lower base is called the analogous pole, the upper to ... |
|
![]() |
|
Roger Warin Replies: 9 Views: 1521 |
![]() |
Hello,
I don't think I've ever seen an azurite cleavage. Here is an old specimen of Tsumeb (Willy Israel) without any breakage but whose termination of a crystal is not harmonious. Blemishes are gr ... |
|
![]() |
|
Roger Warin Replies: 29 Views: 9449 |
![]() |
I am really very interested in your thoughts.
Can you say more? |
|
![]() |
|
Roger Warin Replies: 6 Views: 1759 |
![]() |
Hello,
Happy new year 2023. I recently had the opportunity to acquire this fine specimen of elbaite from Pederneira. It was purchased from Idar-Oberstein in the 1960s. This is the twin {10.1} reput ... |
|
![]() |
|
Roger Warin Replies: 8 Views: 5266 |
![]() |
Hello,
I think the problem comes from the atmosphere in the box. It is hardly conceivable to replace it with nitrogen or argon, but why not with CO2? It would suffice to introduce a small piece of ... |
|
![]() |
|
Roger Warin Replies: 12 Views: 3219 |
![]() |
Olivine and ferronickel in Jepara (Indonesia) pallasite.
XPol; lighting. |
|
![]() |
|
Roger Warin Replies: 4 Views: 1106 |
![]() |
Hello,
Given the origin, of Kabolela, I think it is either shattuckite or plancheite and certainly not chrysocolla. But since plancheite is lighter than the more pronounced blue shattuckite, so I wo ... |
|
![]() |
|
Roger Warin Replies: 24 Views: 36926 |
![]() |
Hello,
I knew very well (a matter of age) Roger Titeux from Nancy. Lorrain like me, outside the borders, Roger was a close friend. He often gave me the following advice: Collect hard minerals. Avo ... |
|
All times are GMT - 5 Hours |