A Skyrim mod which bugfixes the "No Stone Unturned" quest, allowing Stones of Barenziah to stack properly in your inventory. Because quest markers on the Stones are fairly popular, and this mod won't be compatible with other mods which add them, I've also added them as an option.
SSoB is available on Nexus Mods.
SSoB for Skyrim Special Edition SSoB for Skyrim (not maintained)