Capturing Fused spren

[StormFather!]

Ok, so we know that the Fused’s spear can forcibly remove stormlight (Investiture).

The Fused are cognitive shadows/spren (self aware Investiture)

So could you capture a Fused in a gem by stabbing them in the gemheart, which would break it, releasing their spren/cognitive shadow. Then, the spear sucks up the Investiture and captures them in a gem.