Conversion of Chromium Shards to Shard Shop use has a 10 - 1 currency exchange. I crunched the numbers several times on this to be sure. To be clear, 10 shards from Chromium packs will get 150 credits in the Shard Shop. And 300 Shard Shop credits buys only 2 shards. Also, The shop has limited options to choose from, rarely refreshes and could use other purchase options too!