Pantai Pasir Mat Hassan (or perhaps easily called D'Coconut Beach in reference to the resort that bears the same) is located in front of D Coconut Lagoon Resort.
In general, Pulau Lang Tengah itself is located almost midway between Pulau Redang and Pulau Perhentian. The boat departure is located at Merang Jetty, some 35 kilometres to the north of Kuala Terengganu.
Playing second fiddle to the more popular Pantai Pasir Air (or simply known as Blue Coral Beach), Pantai Pasir Mat Hassan is not particularly interesting. It does not have what it takes to make a great beach per se, but with the little amount of white sands that it has, accompanied by decently clear water and palm swaying trees, will still make a good photographic and relaxing moment for its patrons.
In general, the beach is quite rocky at parts. There were a lot of sharp debris by dead corals that were washed ashore. Nonetheless, you can still find you spot here in the patches of white sand to sunbathe and reflect on the beautiful surrounding.
There is a snorkeling spot nearby that I managed to venture called Karang Bahar, just off to the right hand side of the beach. It wasn't a particular good snorkeling I must say, but you can still see some varieties of underwater stuff.
The sunset view at this beach was particularly breathtaking during my visit. While you may not be able to see the actual sun setting on the far horizon, its golden reflections can still be thoroughly enjoyed from the beach.