The source on the emerald mine is Errol himself during an interview with Business Insider South Africa: https://www.businessinsider.co.za/how-elon-musks-family-

The source on the emerald mine is Errol himself during an interview with Business Insider South Africa: https://www.businessinsider.co.za/how-elon-musks-family-came-to-own-an-emerald-mine-2018-2 https://www.businessinsider.co.za/how-elon-musks-family-came... It's a primary source, not speculation. Here's some additional context: https://www.businessinsider.com/elon-musks-dad-tells-bi-about-the-familys-casual-attitude-to-wealth-2018-2 https://www.businessinsider.com/elon-musks-dad-tells-bi-abou...