Platinum
Platinum exists in higher abundances on the Moon and in meteorites. Correspondingly, platinum is found in slightly higher abundances at sites of bolide impact on Earth that are associated with resulting post-impact volcanism, and can be mined economically; the Sudbury Basin is one such example.
Platinum as an investment
Platinum is relatively scarce even among the precious metals. New mine production totals approximately only five million troy ounces (150 Mg) a year. In contrast, gold mine production runs approximately 82 million ounces (2,550 Mg) a year, and silver production is approximately 547 million ounces (17,000 Mg). As such, it tends to trade at higher per-unit prices.