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Wheeler, the bubbles, small and big, long and short are all lined up parallel to the long axis of the tubes and the central holes. IMHO the glass, being pure silica with a melting temperature of more than 1,600C, is natural, but of course it has been worked by Man. I can post images of some small tubes with central holes that were drilled by Man, and they are all over the place.

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Subject Views Written By Posted
The amazing Hongshan Natural Glass Tubes 3304 drdavidanderson 08-Feb-18 18:08
Re: The amazing Hongshan Natural Glass Tubes 504 MDaines 09-Feb-18 11:28
Re: The amazing Hongshan Natural Glass Tubes 487 drdavidanderson 09-Feb-18 15:24
Re: The amazing Hongshan Natural Glass Tubes 501 michael seabrook 11-Feb-18 21:50
Re: The amazing Hongshan Natural Glass Tubes 483 drdavidanderson 12-Feb-18 08:32
Re: The amazing Hongshan Natural Glass Tubes 465 Apap 13-Feb-18 01:04
Re: The amazing Hongshan Natural Glass Tubes 477 drdavidanderson 13-Feb-18 05:40
Re: The amazing Hongshan Natural Glass Tubes 453 Apap 13-Feb-18 22:38
Re: The amazing Hongshan Natural Glass Tubes 455 Wheeler 13-Feb-18 12:15
Re: The amazing Hongshan Natural Glass Tubes 442 drdavidanderson 13-Feb-18 12:38
Re: The amazing Hongshan Natural Glass Tubes 450 Wheeler 13-Feb-18 13:05
Re: The amazing Hongshan Natural Glass Tubes 458 drdavidanderson 13-Feb-18 14:31
Re: The amazing Hongshan Natural Glass Tubes 452 Wheeler 15-Feb-18 03:22
Tubes and ancient themes. . . 468 Reagent 15-Feb-18 07:02
. . . Forgot to ask . . 458 Reagent 15-Feb-18 07:59
Re: . . . Forgot to ask . . 434 drdavidanderson 15-Feb-18 08:16
Fine lathing technique??? 469 Reagent 15-Feb-18 08:43
Re: Fine lathing technique??? 433 drdavidanderson 15-Feb-18 08:58
Re: The amazing Hongshan Natural Glass Tubes 436 Wheeler 15-Feb-18 11:12
Re: The amazing Hongshan Natural Glass Tubes 441 drdavidanderson 15-Feb-18 11:25
Re: The amazing Hongshan Natural Glass Tubes 447 Wheeler 15-Feb-18 11:44
Re: The amazing Hongshan Natural Glass Tubes 481 jazzmumbles 15-Feb-18 13:01
Re: The amazing Hongshan Natural Glass Tubes 580 Wheeler 19-Feb-18 02:23
Re: The amazing Hongshan Natural Glass Tubes 452 drdavidanderson 19-Feb-18 13:55
Re: The amazing Hongshan Natural Glass Tubes 432 Wheeler 20-Feb-18 20:19
Re: The amazing Hongshan Natural Glass Tubes 518 drdavidanderson 20-Feb-18 18:27
Re: The amazing Hongshan Natural Glass Tubes 505 Wheeler 20-Feb-18 20:24
Re: The amazing Hongshan Natural Glass Tubes 442 drdavidanderson 20-Feb-18 21:21
Re: The amazing Hongshan Natural Glass Tubes 492 Wheeler 20-Feb-18 21:44
Re: The amazing Hongshan Natural Glass Tubes 585 Wheeler 21-Feb-18 11:51
Re: The amazing Hongshan Natural Glass Tubes 640 pgalaxy 26-May-18 11:25


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