Stone scarab: where to get it

Source	Quantity	Chance per roll
Grand Gold Chest (Room 1)	1	1/2
Grand Gold Chest (Room 2)	1	1/2
Grand Gold Chest (Room 3)	1	1/4
Sarcophagus (Pyramid Plunder) (Room 3)	1	1/4
Sarcophagus (Pyramid Plunder) (Room 4)	1	1/2
Sarcophagus (Pyramid Plunder) (Room 5)	1	1/2
Sarcophagus (Pyramid Plunder) (Room 6)	1	1/2
Sarcophagus (Pyramid Plunder) (Room 7)	1	1/4
Urn (Pyramid Plunder)	1	Unknown