I am not very familiar with Thai jewelry, so I looked around a bit.
This seems to be the ruby and diamond necklace worn by Queen Sirikit:
The earrings are different, but Queen Suthida wore them previously, with a ruby and diamond buckle:
The emerald set, I only found this photo of the brooch:
I wasn’t able to find a photo of Queen Sirikit wearing the other emeralds. However, her jewelry collection is truly enormous. Just a quick google has turned up no less than 7 tiaras