11. The last Victoria Holt novel, " The Black Opal ", was published after her death. 12. Foster's has a wine subsidiary that includes Black Opal , Wolf Blass and Greg Norman Estates. 13. During the 1920s she was part of a literary group known as the Black Opals . 14. "' Glorious Jubilee "'is the world's largest black opal from carats with Gray base multi colors. 15. She invested in the stock market, bought and sold antiques, and collected black opals from Lightning Ridge. 16. Of these hues, the black opals are the most rare, whereas white and greens are the most common. 17. Black Opal Pool in Biscuit Basin last exploded in the spring of 1925 and has since been quiet.18. Pair this with : A Black Opal shiraz from southeastern Australia _ for the brawny, outback kinda guy. 19. The Lightning Ridge area is a world-renowned centre of the mining of black opals and other opal gemstones. 20. They were part of a literary and intellectual group in Philadelphia who also became known as the Black Opals .
