$ 7
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Description
Our conoscope is a strain free glass ball held within a black plastic protective case with convenient handle. The conoscope allows you to see 2-d representation of the 3-d interference of the axis within the gem. The axis and its visual image is also called the interference figure. Dimensions: 56 x 16 x 8 mm Lens: 15mm Warranty: 3 year! strain free glass ball held within a black plastic protective case with convenient handle allows you to see 2-d representation of the 3-d interference of the axis within the gem
