People look at gemstones displayed at a booth while visiting the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

A visitor looks at fossil stones during the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

Visitors look at gemstones displayed during the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

A crystal rock is dispalyed during the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

A vendor displays mineral rocks from Ethiopia during the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

A visitor looks at gemstones displayed during the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

People look at gemstones displayed at a booth while visiting the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

A visitor looks at fossil stones during the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)

A visitor takes a closer look to a piece of gemstone with magnifying glass during the Gem and Mineral Show in Vancouver, British Columbia, Canada, on March 25, 2022. The three-day show features about 100 vendors from across Canada with their gem, mineral and rare fossil collections. (Photo by Liang Sen/Xinhua)