Well, actually, no. A colleague where I’m working just returned from taking his 82-year-old mother on the “Mini-Haj” in Mecca (he had spent some time in advance getting into shape so as to be able to push her wheelchair the necessary distances). When he saw these in Mecca, he thought of his geologist friends and brought them back – they’re candies/sweets, chocolate inside, a sugar colourful glaze on the outside. And they are granule-size, not sand. So this post is entirely a hoax, a bit of perhaps much-needed fun – and they are good!