Snellius Minerals Natural Smoky Quartz Sphere

Description: Snellius Minerals Natural Smoky Quartz Sphere This item is a natural smoky quartz sphere selected for its ability to display the optical properties of quartz. The natural smoky quartz spheres are fairly uniform and so the photos in this listing are of a representative sphere. Some small variations in size, color, and inclusions do occur, but all can display a quartz uniaxial optic axis interference figure and the influence of Brazil law twinning. Sizes run between 18 mm and 21 mm for the quartz spheres in this listing. In contrast to the various natural quartz slices, the quartz sphere allows for many different views through the quartz specimen. However the sphere is a more complicated geometry for thinking about the optical properties of quartz. You will want a polariscope to fully appreciate the natural smoky quartz sphere. The main photo for the listing shows a smoky quartz sphere viewed along the c-crystallographic axis with crossed polarizers displaying a quartz uniaxial optic axis interference figure. The video demonstrates the natural smoky quartz sphere when viewed with transmitted plane polarized light as well as crossed polarizers. With the smoky quartz sphere pleochroism is apparent in plane polarized light and with crossed polarizers it is possible to find the quartz uniaxial optic axis interference figure and c-crystallographic axis. The second photo shows a sphere viewed with transmitted plane polarized light.Thank you, and check out some of our other items for sale. We aim to provide the nerdiest minerals possible! Combined shipping available for many items. Please note, these spheres do act as converging lenses, so best not to leave them in direct sunlight near flammable materials!

Price: 5 USD

Location: York, Pennsylvania

End Time: 2024-12-11T21:52:53.000Z

Shipping Cost: N/A USD