HI dark angel I have a tiffany charm bracelet that I wear everyday for the past 4 years..I think the durability of the enamel is perfectly fine but the discoloration is a huge disappointment..I have the pink cupcake, sig. blue box, blue key, rodeo charm, and the ballerina shoe that just came out... my pink cupcake charm has turned to a gross almost brownish pink color and no longer looks bright pink.. my box has slight discoloration as well on the sides.. I saw this issue start about a year after I got the charms and Tiffany said it is the nature of how ports the enamel is so therefore they will not replace the charm...The oils from our skin, lotion, perfume, even certain soaps cause this... I have noticed that my key charm has not had any discoloration and I purchased that about 2 years after the box and cupcake. I have a feeling they have made changes to the amount of enamel thickness and slight color change just in general. I was actually in the store today trying on necklaces when I realized how much "thinner" the enamel looked now.. because your getting a pendant you may not have the same issues if its laying on the silver side to your skin or if they changed something to help the discoloration issues but I would definitely keep this in mind while purchasing. Hope I helped
Also I will try and post pictures if you want..I first have to figure out how though