A man visits the Vancouver Gem and Mineral Show in Vancouver, Canada, March 24, 2017. (Xinhua/Liang Sen)
People visit the Vancouver Gem and Mineral Show in Vancouver, Canada, March 24, 2017. (Xinhua/Liang Sen)
A man takes a closer look to a piece of blue sapphire during the Vancouver Gem and Mineral Show in Vancouver, Canada, March 24, 2017. (Xinhua/Liang Sen)
