I have had my ring for 14 years, my earrings for maybe 15-16 years and my necklace for 10 years. Love them all
My ring is worn daily and I originally had platinum for the stone setting and had to change to white gold since the platinum was too soft and the prongs bent. But the stone is perfectly fine. Whenever I go to have it cleaned I tell them it is moissanite so they don't use any harsh chemicals.
Mine were purchased online though...