Bloomberg Western Australia may ask Rio Tinto Group and BHP Billiton Ltd. to pay potentially billions of dollars to end a mining rent tax to help patch a budget decimated by lower commodity prices. The state government is seeking advice on a proposal that would see the nation’s two biggest miners pay out an iron-ore levy early in a one-off …

Bloomberg Not everything Elon Musk touches has been a runaway sales success. While Tesla Inc.’s Model S has been a hit and thousands lined up to order the upcoming Model 3 sedan, the Model X sport utility vehicle hasn’t met the chief executive officer’s expectations. Model X deliveries have yet to keep pace with the Model S, as Musk predicted, …

Bloomberg In the diamond industry, the only place that really matters is the US, and the market is starting to look a little shaky. In a country where consumers buy almost half the world’s gems, Tiffany & Co. and Signet Jewelers Ltd. this week reported disappointing sales. That’s a blow to expectations that President Donald Trump’s pro-business policies would give …