Queen Maxima's bracelets in Isabelle's first and second photos have captured my eye.

Does anyone know anything about the bracelet nearest the Queen's wrist in the first photo?

In the second photo the bracelet on the Queen's left arm reminds me of the diamond necklace which can be worn with different clasps and (I think) sometimes different gemstones instead of some of the diamonds.

Is this a matching bracelet or does the necklace break up into different jewels? What of the clasp?