Non-fungible token exchange OpenSea on Monday has acquired NFT marketplace aggregator Gem for an undisclosed price, according to a blog post. Gem allows its users buy NFTs across multiple marketplaces all in one transaction. It also offers analytical tools and rarity rankings. “As the NFT community grows, we’ve recognized a need to better serve more experienced, ‘pro users,’ and offer more flexibility and choice to people at every level of experience,” the blog post read. OpenSea will integrate "the best of Gem's features." Upon closing of the deal, Gem will continue to operate as a stand-alone product and brand, New York City-based OpenSea said. In the end of March, OpenSea hinted at supporting Solana (SOL-USD) NFTs on its exchange.