Very similar to Graptoveria Opalina which is a Colorata X Amethystinum, Ralla is a Grapto X Laui. A gorgeous hybrid. Opalina have always been a weakness for me, so have Laui and their hybrids so this is just the ultimate for me. You will receive one similar to the one shown! Only a couple available 

Graptoveria Ralla (Laui x Amethystinum)