Natural diamonds, cross polarized light (black diamond add)

JL · Post by JL » Sat May 09, 2020 5:28 am

Given the color of the background, a 1/4 Lambda plate was used. A Lambda plate would produce a bright magenta background-color.

Linden.g · Post by **Linden.g** » Sat May 09, 2020 5:50 am

Nathan Renfro wrote:Nice photos . This strain birefringence is normal in diamonds. How big are these crystals? Diamonds are one of my favorite minerals to look at. In particular, their surfaces can be quite spectacular using epi DIC microscopy.

Nathan, they are about 0.5 mm across

This example is a flatter crystal

Linden.g · Post by **Linden.g** » Sat May 09, 2020 5:54 am

JL wrote:Given the color of the background, a 1/4 Lambda plate was used. A Lambda plate would produce a bright magenta background-color.

When I say a Lambda, I really mean a home made phase plate out of plastic. I also rotated the top polarizer slightly as it transitioned from magenta to green and found a more neutral colour and then did white balance in the camera to remove off colour.

Sumguy01 · Post by **Sumguy01** » Sat May 09, 2020 9:43 am

Very nice.
Thanks for sharing.

Linden.g · Post by **Linden.g** » Sat May 09, 2020 9:51 am

Sumguy01 wrote: Very nice.
Thanks for sharing.

Thanks, this one is really complex

Linden.g · Post by **Linden.g** » Mon May 11, 2020 7:38 pm

A different batch of diamonds

Linden.g · Post by **Linden.g** » Tue May 12, 2020 6:38 am

Black diamond