I Have about 100 x that I want to sell for 1s each.
I really want to free my inventory space, so if you buy more then 20 gem shards I'll add some extra ones with no additional charge
If you need a reminder about the inspiration gained from those shards, here is a link to the wiki:
Salem Wiki: Gem_Shard
Please note that while the wiki states that it can be used for paving, it doesn't look like it's true anymore. It seems to be used only as an inspiration item.
Send a PM if you are interested.