https://minimuseum.com/products.html

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Adorn your desk with a collection of rarities with the Mini Museum Third Edition. Encased within this 5" x 4" x 1" Lucite acrylic block is a carefully presented assortment of 29 rare and unusual objects from around the world (and beyond). Highlights include a piece of a Steve Jobs turtleneck, slivers of dinosaur bone, a chunk of an SR-71 Blackbird, and space gems that are over 4.5 billion years old. Each one comes with a full-color companion guide offering more background on the specimens, and for those with smaller desks, there's a 4" x 3" x 1" option that cuts things down to just 12 examples.