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://www.weirdgoogleearth.com/wp-content/uploads/2020/09/saudi-blue.jpg?v=1617228047https://www.weirdgoogleearth.com/wp-content/uploads/2020/09/saudi-blue-150x150.jpg?v=1617228047WeirderNatural 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