Saint Laurent 18k Gold Bracelet YSL charm will not change color

This exquisite Saint Laurent bracelet features a classic gold chain adorned with a whimsical lizard charm. This is not authentic however the design is identical to ySL bracelet The charm's warm amber hue adds a playful touch to the elegant design, making it a standout piece in any jewelry collection.i am unsure if it is authentic. This the price it’s is 18k