formation of corundum

3:53

6:16

1:20

5:34

8:51

2:01

3:00

14:15

7:53

5:09

2:01

26:53

1:05:03

2:03

20:23

2:15

3:58

25:38

31:45

50:44

2:35

45:10

31:33

2:50

کوتاه

37:33

7:58

8:27

7:54

15:50

5:04

12:34

2:17:12

21:11

کوتاه

26:21

10:44

1:21

1:36:15

5:48