A loose diamond is showed at the International Diamond Week in Israel (IDWI) in Ramat Gan, Israel, on Feb. 10, 2020. The IDWI opened on the huge trading floor of the Israel Diamond Exchange on Monday in Ramat Gan. Hundreds of Israeli and international diamond companies attend the event which will be concluded on Feb. 12, 2020. (Xinhua/Chen Wenxian)

People take part in the International Diamond Week in Israel (IDWI) in Ramat Gan, Israel, on Feb. 10, 2020. The IDWI opened on the huge trading floor of the Israel Diamond Exchange on Monday in Ramat Gan. Hundreds of Israeli and international diamond companies attend the event which will be concluded on Feb. 12, 2020. (Xinhua/Chen Wenxian)

A loose diamond is pictured at the International Diamond Week in Israel (IDWI) in Ramat Gan, Israel, on Feb. 10, 2020. The IDWI opened on the huge trading floor of the Israel Diamond Exchange on Monday in Ramat Gan. Hundreds of Israeli and international diamond companies attend the event which will be concluded on Feb. 12, 2020. (Xinhua/Chen Wenxian)

A man examines a loose diamond during the International Diamond Week in Israel (IDWI) in Ramat Gan, Israel, on Feb. 10, 2020. The IDWI opened on the huge trading floor of the Israel Diamond Exchange on Monday in Ramat Gan. Hundreds of Israeli and international diamond companies attend the event which will be concluded on Feb. 12, 2020. (Xinhua/Chen Wenxian)

People take part in the International Diamond Week in Israel (IDWI) in Ramat Gan, Israel, on Feb. 10, 2020. The IDWI opened on the huge trading floor of the Israel Diamond Exchange on Monday in Ramat Gan. Hundreds of Israeli and international diamond companies attend the event which will be concluded on Feb. 12, 2020. (Xinhua/Chen Wenxian)