Hello, I must say that this is trading one confusing thing for another confusing thing.
As you may know, we already have skystealer crystals, which are one category of crystal that are used of upgrading skystealer accessories, and then we have sacred crystal, elysian crystal, soulstone crystal and moonstone crystal. If you name this sterling crystal, that might imply that this item is somehow related to accessory upgrades. I urge you to rethink this decision and name it something less confusing and more unique, or in line with what the upgrade is for. Since it replaces sacred vials, maybe name it sterling glass bottle or sterling pitcher.
On behalf of thoroughly confused community,
Rhiakath