Kate was very fond of statement earrings during her twenties. Here is one pair she wore several times.
The earrings look like kites to me: a main base at the top followed by long thin chains draping down alongside the face. They move quite easily and do not appear to be stiff. The ends of the chains carry small metal discs. The earrings hang from a French hook.
While out clubbing in May 2007, Kate was seen wearing this costume jewelry bracelet.
The closeup shows us that this is a stretchy cuff-style bracelet that is divided into square sections. Each segment is connected to the others by stretch cords. The bracelet is primarily black with white polka dots arranged across it in a neat three row pattern, two dots per row. There are 6 white dots on each segment.
Kate was visiting a nightclub in 2007 when she wore these statement earrings.
Here is the closeup:
Here is the more recent closeup.
They are extremely large earrings. A burnished ball post is the anchor for the pear shaped pendant. The pendant is a concave silver disc with a rim of silver at the borders. It looks like the pendant is gunmetal gray while the ball post is a yellowish gray.I estimated that these are perhaps 3.5 inches long, maybe even longer.
It looks like these are rock crystals, set in a teardrop/small post style. They are possibly set in silver or mixed metals.
Here is a clearer photo of her wearing them.
She may have worn them more recently (December 2016) to a private event.
Around 2007, Kate wore these double drop silver and green stone earrings.
Here is the closeup:
At a distance, it’s hard to see the gemstone or bead in the center. The earrings consist of two round pendants. Each pendant is made of two round silver circles, the smaller one settled inside the larger one. Suspended in the center of each double-circle pendant is a single green stone or bead. There appears to be silver connectors on four equal outer sides of the smaller circle (connecting it to the larger circle) as well as a small silver connector just above the green stone.
I believe this is silver plated or possibly tarnished silver. The dim contrast of the photo doesn’t show us the true shine of the earrings.