Fossil from the beginning of life and others from Niagara

[Charline]

This is the second part of my interesting finds from the mineral collection trip in the Niagara Region.


I also examined some specimens under the black UV light which reveals more intriguing colors and patterns.


https://youtu.be/KwaQianlSGQ?feature=shared

[Shortsighted]

I like your rotating platter. It reminds me of a microwave oven. Perhaps you could use a piece of felt for the top of the platter instead of warped paper card so that it rests flat and even.  I also like the way you use samples in the foreground below the level of the platter. Mentioning the associated minerals, or rock, really should be accompanied by an explanation of what they represent. For instance, what exactly is Dolomite?
One particularly impressive colour change (tenebrescence) to UV light exposure occurs with an off-white form of Sodalite, which is usually blue in normal white light. I've attached a shot of this mineral, called Hackmenite, as it appears in full spectrum light and then the same sample as it appears in UV light whereupon it becomes reddish in colour. The third attachment is a block piece of the lead sulfide ore called Galena.


Hackmenite


Same sample of hackmenite in UV light


Cubic block of Galena (lead ore) ... lead sulfide
 

[Charline]

LOL, micro wave oven? I did not know that you would use one! Ain't you afraid of radiation?


The rotating display stands were invented long before the micro wave ovens. In old days, people put pizza, cake, and all sorts of food on top of it. Except, if you have not noticed, mine is using solar energy. I also have a bigger stand, pizza-sized one, which can be turned around manually.


Using felt, or a similar material is a good idea. I will look into it. Thanks.


Did you see that I also collected a piece of galena? My club friend found a great one with a cubic shaped crystal.


Sometimes sodalite shows orange. I am surprised that yours shows pink. What is the wave length of your UV light?


 

[Shortsighted]

My reference to a microwave oven was only an analogy, not that I would expect anyone to deconstruct such an oven just for the motorized platter. I included the photo of a sample of Galena only because you mentioned that ore in your presentation. The UV light was as a 48" fluorescent tube so I have no idea what frequency band it radiated. I don't have it anymore. The small piece of Hackmenite I've had for so long that I can't recall where I found it, thinking at first that it was something less interesting. It sort of resembles calcite. Any other Sodalite I might still have laying around is of the more common variety (blue and slightly streaked in off-white) and probably came from Bancroft, et al.

[Charline]

Different UV light wavelength will determine what colors are visible. I have three different kinds of UV lights. Each has a different wavelength.


The one that I used in my video is the "black" 365nm UV light. Under my 395nm UV light, pink color is more visible.

[Shortsighted]

Three different UV lights, eh. You don't fool around. Sorry, that didn't come out right. I only had the one light at the time and now I have nix, so I can't fool around at all. Not that I need UV any more. I get more than enough of it when I go out birding. I may need to get sunblock soon. I hate that stuff. I mean, what else am I suppose to carry along? My bag is already full. Where will I pack my nonchalance?



Sodalite

[Charline]

I don't carry my UV lights around. I suppose I can carry one at least, it is a small flashlights


Your sodalite is nice. I have some sodalite pebbles.


I photographed some of my specimens.

[Shortsighted]

Nice work! I love it when someone puts an effort into something. The time will come, soon enough, when it won't be possible to put an effort into anything at all. By that time you'll likely wish you has done it when you still could. Good depth-of-field and good lighting, which is essential on-the-flat. When you have a video of a revolving carousel, instead of on-the-flat, then that stuff is not so important. I don't suppose you were ever a museum curator? You should have a cabinet with compartments for your samples.

[Charline]

Sir, I appreciate your kind words, but I have not started to work in this way from a few days ago. I have been taking commercial photos for sale for about two decades.