Mark Longman was hiking around Castlewood Canyon State Park with questions that mounted with every boulder and rock wall he passed.

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Two Olympus Vanox microscopes, one for biological material and one for thin sections. A digital camera can be attached to these cameras for image capture, and a point counting unit is available for ...

It’s “cement” of a surprise gem. Through the intense scrutiny of an Olympus Vanox microscope, researchers determined opal to be coating the conglomerate’s inner grains and pebbles.