NEW YORK ( TheStreet) -- Precious metals have become a major region of interest for ETF fund sponsors. Since its introduction in late 2004, the physically based SPDR Gold Shares ( GLD) has taken off in popularity, gathering over $60 billion in assets, making it the second largest ETF in the world.Over the ensuing years, the success of this fund has been noticed by large and small providers. Many, attempting to profit from interest in this corner of the market, have launched their own funds designed to offer ways to gain access to these shiny resources. While some firms, like Global X and Market Vectors, have opted to take the equity-based route with miner funds like the Global X Silver Miners ETF ( SIL) and Market Vectors Gold Miners ETF ( GDX) respectively, others have chosen to use futures contracts or physical stockpiles to provide investors with direct access to their desired metals. Many of the physically based single commodity precious metal ETFs like GLD, iShares Silver Trust ( SLV) and ETFS Physical Palladium Shares ( PALL) have proven wildly popular amongst investors. Sensing persistent rampant demand for these shiny metals, providers have continued to develop and evolve their product lines, offering new and unique ways to gain direct access to these commodities. One particularly interesting development has been the introduction of precious metal basket funds. Today, using products offered by companies such as ETF Securities and PowerShares, investors can instantly tap into two or more precious metals at the same time. These consolidated precious metals funds may prove popular for a variety of different scenarios. For instance, precious metal bulls who prefer a hands-off approach to investing may find the ETFS Physical Precious Metals Basket Shares ( GLTR) to be ideally suited. This fund is a one-stop-shop precious metal ETF, combining exposure to four resources: gold, silver, platinum, and palladium. According to the fund's Website, each share exposes investors to approximately 0.3 ounces of gold; 1.1 ounces of silver; 0.004 ounces of platinum; and 0.006 ounces of palladium. ETF Securities' ETFS Physical White Metals Basket Shares ( WITE), meanwhile, may prove more attractive for those looking for an active approach to precious metal investing. Each share of WITE provides investors with exposure to a combination of silver, platinum and palladium. According to its sponsor, WITE's per-share metal entitlement is approximately 1.0 ounce of silver; 0.01 ounce of platinum; and 0.08 ounce of palladium.