I heated some of Enfleurage's Oman Nagdi frankincense last night and this morning. While quite nice, I didn't pick-up on an orange blossom note, specifically. Definitely got a citrus note from it, and a light, earthy, almost copal-like undercurrent. I appreciate it for its non-overly clean and zesty profile.
Not sure if that's the same frankincense ("Black") which masstika was referring to, though.