After much searching, I have finally found the earrings that Kate was wearing.
They are Kiki McDonough from her 'Grace Collection.' The earrings are set in white gold with a white topaz center stone surrounded by diamonds.
Kate's gloves have been ID'ed (thanks to 'Tatiana's Delights' on FB). They are by Fownes and are no longer available.
The gloves are soft Nappa leather with a red cuff trim. The lining is a lambswool & angora blend knit.