What’s this patch of seemingly blue sand in the middle of the Saudi Arabian Desert?

Name: Saudi Blue

Lat, Long: 24.1557543,48.2743421

Location: Al Dahnaa Desert, Saudi Arabia

https://i0.wp.com/www.weirdgoogleearth.com/wp-content/uploads/2020/09/saudi-blue.jpg?fit=1000%2C676&ssl=1https://i0.wp.com/www.weirdgoogleearth.com/wp-content/uploads/2020/09/saudi-blue.jpg?resize=150%2C150&ssl=1WeirderNatural formationsNatureAl Dhanaa Desert,Deserts,Nature,Saudi ArabiaWhat's this patch of seemingly blue sand in the middle of the Saudi Arabian Desert? Name: Saudi Blue Lat, Long: 24.1557543,48.2743421 Location: Al Dahnaa Desert, Saudi ArabiaPeculiar places from around Google Earth