Today was a big day for die-hard Apple (NASDAQ:AAPL) fans who have been patiently waiting for the company's next big announcement. Despite technical difficulties with the company's livestream of the event, Apple kept its promise, unveiling its latest line up of technology: the iPhone 6, iPhone 6 Plus and an eye-catching new smart watch. As the company deconstructed all the latest features of those products, Tantalum Investing News thought it would be worth taking a look at what exactly is in them. Like other high-tech devices, Apple's products use a wealth of precious, industrial and critical minerals, including gold, platinum, copper, tantalum and rare earths. While most of those minerals can be sourced from safe jurisdictions, some — like tantalum — have become synonymous with the words "conflict minerals," as they tend to be sourced from conflict regions in the Democratic Republic of the Congo (DRC). To promote supply chain transparency, the US Securities and Exchange Commission (SEC) required that companies that use tantalum, tin, tungsten and/or gold sourced from conflict regions like the DRC file a Conflict Minerals Report by May 31, 2014 in compliance with Section 1502 of the Dodd-Frank Act. Though some companies were not too keen on submitting their disclosure statements, earlier this year Apple met with the requirements stipulated by the SEC and submitted a Conflict Minerals Disclosure statement. Apple has also taken it upon itself to provide the public with a quarterly smelter list that identifies the smelters it uses for its products and how they fit in line with the Conflict-free Smelter Program. It's not overly encouraging to see conflict minerals on the materials list of a large, well-known company like Apple, but the company is making a concentrated effort to clean up its supply chain and ensure that any materials or smelters it uses are conflict free.