Unique Petrified Wood Pen Holder

Unique petrified wood pen holder. I'm unclear as to what the items on top are encased in, possibly some type of resin. The items appear to be various types of rocks The bottom is blach and the sticker indicates it is petrified wood. The top is sort of a pyramid shape. The gold pen does not work, it just needs a new pen cartridge. IThe measurments are approximately 9.5 inches long, 2.5 inches tall, and 3 inches deep. It is in good condition and very unique. Please refer to photos and contact me with questions or for additional information. Items sold as-is. Thank you.