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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 3545 drdavidanderson 08-Feb-18 18:08
Re: The amazing Hongshan Natural Glass Tubes 560 MDaines 09-Feb-18 11:28
Re: The amazing Hongshan Natural Glass Tubes 542 drdavidanderson 09-Feb-18 15:24
Re: The amazing Hongshan Natural Glass Tubes 565 michael seabrook 11-Feb-18 21:50
Re: The amazing Hongshan Natural Glass Tubes 539 drdavidanderson 12-Feb-18 08:32
Re: The amazing Hongshan Natural Glass Tubes 526 Apap 13-Feb-18 01:04
Re: The amazing Hongshan Natural Glass Tubes 534 drdavidanderson 13-Feb-18 05:40
Re: The amazing Hongshan Natural Glass Tubes 515 Apap 13-Feb-18 22:38
Re: The amazing Hongshan Natural Glass Tubes 513 Wheeler 13-Feb-18 12:15
Re: The amazing Hongshan Natural Glass Tubes 497 drdavidanderson 13-Feb-18 12:38
Re: The amazing Hongshan Natural Glass Tubes 504 Wheeler 13-Feb-18 13:05
Re: The amazing Hongshan Natural Glass Tubes 515 drdavidanderson 13-Feb-18 14:31
Re: The amazing Hongshan Natural Glass Tubes 506 Wheeler 15-Feb-18 03:22
Tubes and ancient themes. . . 525 Reagent 15-Feb-18 07:02
. . . Forgot to ask . . 520 Reagent 15-Feb-18 07:59
Re: . . . Forgot to ask . . 488 drdavidanderson 15-Feb-18 08:16
Fine lathing technique??? 528 Reagent 15-Feb-18 08:43
Re: Fine lathing technique??? 487 drdavidanderson 15-Feb-18 08:58
Re: The amazing Hongshan Natural Glass Tubes 493 Wheeler 15-Feb-18 11:12
Re: The amazing Hongshan Natural Glass Tubes 500 drdavidanderson 15-Feb-18 11:25
Re: The amazing Hongshan Natural Glass Tubes 502 Wheeler 15-Feb-18 11:44
Re: The amazing Hongshan Natural Glass Tubes 539 jazzmumbles 15-Feb-18 13:01
Re: The amazing Hongshan Natural Glass Tubes 675 Wheeler 19-Feb-18 02:23
Re: The amazing Hongshan Natural Glass Tubes 507 drdavidanderson 19-Feb-18 13:55
Re: The amazing Hongshan Natural Glass Tubes 492 Wheeler 20-Feb-18 20:19
Re: The amazing Hongshan Natural Glass Tubes 588 drdavidanderson 20-Feb-18 18:27
Re: The amazing Hongshan Natural Glass Tubes 569 Wheeler 20-Feb-18 20:24
Re: The amazing Hongshan Natural Glass Tubes 507 drdavidanderson 20-Feb-18 21:21
Re: The amazing Hongshan Natural Glass Tubes 557 Wheeler 20-Feb-18 21:44
Re: The amazing Hongshan Natural Glass Tubes 640 Wheeler 21-Feb-18 11:51
Re: The amazing Hongshan Natural Glass Tubes 741 pgalaxy 26-May-18 11:25


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