I thought this might be a fun and interesting offer. For 1 BTC, I will send you a random assortment of 3 cut gemstones in a plastic, padded gemstone container. 2 BTC gets you 8. I do NOT know what many of the gemstones are. But, I also have a few other gemstones the identify of which I DO know. If I receive two or more offers, I can guarantee that I will include at least one of the following in someone's shipment - Chrome Diopside, Peridot, Ruby, and Emerald. I am not a gemstone expert, so the others you receive may be valuable and I wouldn't even know it.
Who's interested?
Edit: Here are some sample pictures.