Yes, it doesn't matter. AIs read the outfit not the materials. It if reads the materials, the price should be the same across S1-S4.
The necklace cost $2.43US, its neither gold or silver.
Thanks! The stimuli images (S1-S4, S4 is unclose though) were specifically shot at 1536px resolution so the chain links, texture, and drop are clearly legible. Appreciate you taking a look at the repo stimuli!