H Harriet Super_Ideal_Rock Joined Jul 7, 2006 Messages 12,823 Jul 18, 2009 #61 Because they''re too delicate and can break when being set.
chrono Super_Ideal_Rock Premium Joined Apr 22, 2004 Messages 38,363 Jul 18, 2009 #62 Paraibas are still tourmalines and when heated, they are more delicate than the unheated variety.