The Gallery of Gems and Minerals. Miocene Petrified Bogwood (green jasper). Dimensions of Specimen (cm). Polished surface 12.9 x 10.5 cm; at its thickest it is 6.8 cm. Treatments: Weight: Stock #: Other. No Enhancement 944 grams Wood. 18.02.004 felt bottom for protection. Excellent sliced piece of green jasper (dogwood). It ranges from cream colored […]