Radiant Spren and Gemstones?

[Trusk'our he/him]

Can you capture a radiant spren inside a gemstone, perhaps by using raysium? Would you be able to then use the gemstone containing the spren to then replicate the surges? If the spren was bonded to a radiant, could they still summon them as a shardblade, or use their surges?

[Honorless he/him]

Don't see why you wouldn't be able to capture Radiant spren, might need a bigger gemstone but wouldn't have to be King's Drop size, so doable.

I think the Radiant would still remain Radiant, and have access to their Shardplate if they swore the relevant Ideal but they wouldn't have access to the Shardblade