I believe there have been gurus, rishis, & faquiers who've been able to manifest seemingly supernatural powers (levitation, creation of items out of thin air, etc), but a true Vedic Yogi (Hindu holyman) would never resort to these sorts of public displays. Even if they did, I can't imagine them summoning gold trinkets out of the aether. A butterfly or a flower, yes. But gold necklaces? Just not buying it.