Then perhaps we could try to identify the gowns via the information in the Court Circular and match the gowns with the jewels HM was said to have worn.
That might provide us with a way of ascertaining which of the Cartier "Indian" jewels HM was said to have ordered to wear with the "Indian" gowns, she wore at various times.
I appreciate that we can only speculate as we do not have access to her dress books etc, but perhaps some guesses might be of interest.