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How did you determine the composition to be "pure SiO2"? Have you looked at them through a polariscope?

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The amazing Hongshan Natural Glass Tubes 3323 drdavidanderson 08-Feb-18 18:08
Re: The amazing Hongshan Natural Glass Tubes 509 MDaines 09-Feb-18 11:28
Re: The amazing Hongshan Natural Glass Tubes 491 drdavidanderson 09-Feb-18 15:24
Re: The amazing Hongshan Natural Glass Tubes 505 michael seabrook 11-Feb-18 21:50
Re: The amazing Hongshan Natural Glass Tubes 487 drdavidanderson 12-Feb-18 08:32
Re: The amazing Hongshan Natural Glass Tubes 469 Apap 13-Feb-18 01:04
Re: The amazing Hongshan Natural Glass Tubes 482 drdavidanderson 13-Feb-18 05:40
Re: The amazing Hongshan Natural Glass Tubes 457 Apap 13-Feb-18 22:38
Re: The amazing Hongshan Natural Glass Tubes 459 Wheeler 13-Feb-18 12:15
Re: The amazing Hongshan Natural Glass Tubes 446 drdavidanderson 13-Feb-18 12:38
Re: The amazing Hongshan Natural Glass Tubes 454 Wheeler 13-Feb-18 13:05
Re: The amazing Hongshan Natural Glass Tubes 463 drdavidanderson 13-Feb-18 14:31
Re: The amazing Hongshan Natural Glass Tubes 456 Wheeler 15-Feb-18 03:22
Tubes and ancient themes. . . 472 Reagent 15-Feb-18 07:02
. . . Forgot to ask . . 462 Reagent 15-Feb-18 07:59
Re: . . . Forgot to ask . . 439 drdavidanderson 15-Feb-18 08:16
Fine lathing technique??? 475 Reagent 15-Feb-18 08:43
Re: Fine lathing technique??? 438 drdavidanderson 15-Feb-18 08:58
Re: The amazing Hongshan Natural Glass Tubes 440 Wheeler 15-Feb-18 11:12
Re: The amazing Hongshan Natural Glass Tubes 447 drdavidanderson 15-Feb-18 11:25
Re: The amazing Hongshan Natural Glass Tubes 450 Wheeler 15-Feb-18 11:44
Re: The amazing Hongshan Natural Glass Tubes 486 jazzmumbles 15-Feb-18 13:01
Re: The amazing Hongshan Natural Glass Tubes 587 Wheeler 19-Feb-18 02:23
Re: The amazing Hongshan Natural Glass Tubes 456 drdavidanderson 19-Feb-18 13:55
Re: The amazing Hongshan Natural Glass Tubes 437 Wheeler 20-Feb-18 20:19
Re: The amazing Hongshan Natural Glass Tubes 525 drdavidanderson 20-Feb-18 18:27
Re: The amazing Hongshan Natural Glass Tubes 509 Wheeler 20-Feb-18 20:24
Re: The amazing Hongshan Natural Glass Tubes 445 drdavidanderson 20-Feb-18 21:21
Re: The amazing Hongshan Natural Glass Tubes 497 Wheeler 20-Feb-18 21:44
Re: The amazing Hongshan Natural Glass Tubes 590 Wheeler 21-Feb-18 11:51
Re: The amazing Hongshan Natural Glass Tubes 649 pgalaxy 26-May-18 11:25


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