person smashing pick axe on ground

Government officials threw a damper on the enterprise about a week after the rush began: Tests, they said, showed that the stones were quartz crystals, not diamonds.” (Los funcionarios del gobierno echaron un freno a la empresa aproximadamente una semana después de que comenzara la fiebre: las pruebas, dijeron, mostraron que las piedras eran cristales de cuarzo, no diamantes.)

https://www.nytimes.com/2021/07/04/world/africa/south-africa-diamond-rush.html?smid=url-share