So what is 'reticulated' you might ask. Its the name given to a crystal habit of forming 'net-like' growths. Cerussite commonly forms in this way. As you can see in the photo, individual crystals form a regular arrangement, crossing each other at 60 degree angles.
This specimen, which has green malachite associated, is from Brown's Prospect, Rum Jungle, Northern Territory, Australia.
It was included in one of my recent auction lots and now resides in a Queensland collection.