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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 3947 drdavidanderson 08-Feb-18 18:08
Re: The amazing Hongshan Natural Glass Tubes 651 MDaines 09-Feb-18 11:28
Re: The amazing Hongshan Natural Glass Tubes 645 drdavidanderson 09-Feb-18 15:24
Re: The amazing Hongshan Natural Glass Tubes 650 michael seabrook 11-Feb-18 21:50
Re: The amazing Hongshan Natural Glass Tubes 621 drdavidanderson 12-Feb-18 08:32
Re: The amazing Hongshan Natural Glass Tubes 627 Apap 13-Feb-18 01:04
Re: The amazing Hongshan Natural Glass Tubes 628 drdavidanderson 13-Feb-18 05:40
Re: The amazing Hongshan Natural Glass Tubes 622 Apap 13-Feb-18 22:38
Re: The amazing Hongshan Natural Glass Tubes 607 Wheeler 13-Feb-18 12:15
Re: The amazing Hongshan Natural Glass Tubes 590 drdavidanderson 13-Feb-18 12:38
Re: The amazing Hongshan Natural Glass Tubes 595 Wheeler 13-Feb-18 13:05
Re: The amazing Hongshan Natural Glass Tubes 611 drdavidanderson 13-Feb-18 14:31
Re: The amazing Hongshan Natural Glass Tubes 599 Wheeler 15-Feb-18 03:22
Tubes and ancient themes. . . 617 Reagent 15-Feb-18 07:02
. . . Forgot to ask . . 619 Reagent 15-Feb-18 07:59
Re: . . . Forgot to ask . . 579 drdavidanderson 15-Feb-18 08:16
Fine lathing technique??? 625 Reagent 15-Feb-18 08:43
Re: Fine lathing technique??? 583 drdavidanderson 15-Feb-18 08:58
Re: The amazing Hongshan Natural Glass Tubes 581 Wheeler 15-Feb-18 11:12
Re: The amazing Hongshan Natural Glass Tubes 592 drdavidanderson 15-Feb-18 11:25
Re: The amazing Hongshan Natural Glass Tubes 596 Wheeler 15-Feb-18 11:44
Re: The amazing Hongshan Natural Glass Tubes 625 jazzmumbles 15-Feb-18 13:01
Re: The amazing Hongshan Natural Glass Tubes 833 Wheeler 19-Feb-18 02:23
Re: The amazing Hongshan Natural Glass Tubes 598 drdavidanderson 19-Feb-18 13:55
Re: The amazing Hongshan Natural Glass Tubes 589 Wheeler 20-Feb-18 20:19
Re: The amazing Hongshan Natural Glass Tubes 695 drdavidanderson 20-Feb-18 18:27
Re: The amazing Hongshan Natural Glass Tubes 669 Wheeler 20-Feb-18 20:24
Re: The amazing Hongshan Natural Glass Tubes 601 drdavidanderson 20-Feb-18 21:21
Re: The amazing Hongshan Natural Glass Tubes 658 Wheeler 20-Feb-18 21:44
Re: The amazing Hongshan Natural Glass Tubes 743 Wheeler 21-Feb-18 11:51
Re: The amazing Hongshan Natural Glass Tubes 908 pgalaxy 26-May-18 11:25


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