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TOPIC: Hi all !

Hi all ! 2 years 6 months ago #55

HI!
www.dannyjsanchez.com / www.mineralienphotos.com
I wish there was an easy answer to your other questions. It really depends what you want out of the photograph. For me, it's whatever floats my boat. Since I don't work for a lab and ONLY shoot what moves me, there are no rules or prescribed ideas for me to adhere to.
Sometimes I THINK I know what I'm going to shoot so I buy the stone and I never manage to get anything photos of it!
Sometimes I'm sure a stone has nothing to offer but I look anyway and, sure enough, there's a great photo in there!
At the very least, I can say this: colorless or light toned stones that are SR or have a small birefringence will be easiest.

813398 wrote: Hi Danny,

I missed your talk at the Conference but by all accounts, it sounds fantastic! Do you have a website that I can visit to see your work?
I would like to get into photomicrography but I am not even sure where to start! How do you know which gemstones to photograph? Or what types of stones will lend themselves well to being photographed?

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Last edit: by Danny Sanchez.

Hi all ! 2 years 6 months ago #56

Hi Barbara. I remember you - thanks!
This is a somewhat advanced endeavor - and not my specialty. Whenever I'm photographing a DR stone, I polarize my light path so as not to have any doubling in the photo.
The only advice I can give you is that if you have a good light source and camera, you can do it. Sounds trite, I know. But to capture tanzanite's pleochroism, you just need the correct angles and that's just patience.

803076 wrote: Hi Danny,

I'm Barbara and we met at the conference where I really enjoyed your talk. Here are some images I took today, can you guess the stone?
I'm really interested in showing the dichroism, any ideas on how to improve that?





The following user(s) said Thank You: Barbara Kolator

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Hi all ! 2 years 3 months ago #76

Hey everyone,

Can you help us identify the inclusions in this topaz crystal?

Gem-A's Henry Mesa took this photograph of a topaz crystal and no-one here, including the incredibly knowledgeable Gem-A tutor Pat Daly, have been able to identify it!

Any suggestions welcomed!

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Hi all ! 2 years 3 months ago #77

Hi Henry,

Great photo! Nice to see the forum in use.

I am not quite sure at the moment, but I will have a think about it.

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Last edit: by Barbara Kolator.

Hi all ! 2 years 3 months ago #78




Sam and I had a look with the microscope yesterday and we took these photos showing the pyrites (which we thought looked great) and the black inclusions. Some of them are short and triangular while others are long and thin needle like. Other look like a tiny hammer or the tags you have in clothes holding the labels! So no idea about those.
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Hi all ! 2 years 3 months ago #79

Hi Henry,
What an interesting specimen! I have seen nothing like those black 'dumb bells' and G&K's 'PhotoAtlas of Inclusions in Gemstones' doesn't seem to show an example. My guess for the octahedral crystals would be fluorite. As for that yellowish spheroid.... Is there any chance of some more photos, showing images of each of the inclusion types at higher resolution?

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Hi all ! 2 years 2 months ago #81

Hi Owen,

As you suggest I think it is probably Fluorite.

I’m not a gemmologist but photo Topaz Crystal1 I think shows that it is not Pyrite,
from my point of view you can almost see the “Columbite” inclusion passing behind the octahedron. Here is a series of extra photos as well.











Henry
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Hi all ! 2 years 2 months ago #82

Thanks for the extra pics, Angharad, they are very helpful as well as being fun to look at. I agree with you that they make fluorite look pretty certain for the two octahedral crystals. Columbite does seem a possibility for the sagenitic, bladed and and some of the other inclusions - but so would cassiterite be? Cassiterite even presents as yellowish translucent crystals occasionally ......

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Last edit: by Owen Lewis. Reason: Tidy

Hi all ! 2 years 2 months ago #83

Angharad, Henry,

Cassiterite in topaz. Chime any bells for you - or not?



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