Yes I beleive that you can. However I am not sure how.
wait let me seee
Ok you need to click on the inventory icon and you will have ruins in the four categories. From there you just need to click on the ruins and you can sell them.
You can sell some of them but not all like steam cd-keys that are usually in chests.
in 3 steps
Choose the game that interests you and play itfor free.
Every game has some quests for which you will receive Soul Gems.
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
You know that on Gamehag you can get real rewards for free, right? Join us, complete walkthrough and get your chest!
Can you sell the rewards you get from a chest