Cee always has great photos for her photo challenges. I try to join in when I can find the time. This weeks challenge is ‘rocks’.
I have not edited these photos, they’re already pretty much black and white. I like them the way they are. I took all of them at the Houston Museum of Natural Science (at various times).
This is a sandstone concretion- formed when extremely hot water flowed through the fine quartz sand and cemented it together, about 20 million years ago). ![](https://i0.wp.com/captainjillsjourneys.com/wp-content/uploads/2016/07/DSC09658.jpg?resize=584%2C879)
This is gypsum.
![](https://i0.wp.com/captainjillsjourneys.com/wp-content/uploads/2016/07/DSC09500.jpg?resize=584%2C388)
This is mesolite and fluoropophylite.
![](https://i0.wp.com/captainjillsjourneys.com/wp-content/uploads/2016/10/DSC01488.jpg?resize=584%2C388)
These are quartz crystals.
![](https://i0.wp.com/captainjillsjourneys.com/wp-content/uploads/2016/10/DSC09518.jpg?resize=584%2C879)
Aren’t they all just gorgeous?! So much of the natural world is so beautiful, from the macro to the micro. I love taking pictures to remind me of it all.
Check out Cee’s challenge and join in the fun. ![🙂](https://s.w.org/images/core/emoji/15.0.3/svg/1f642.svg)
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