Photo references

The rights to all photos not made by the author are reserved (see indicated sources). The commercial use in particular of these photos requires prior approval.

All photos made by the author may be used for scientific purposes, provided the source is indicated. For commercial use, please ask for permission from the author.

 Summary: 18th photo: Schad, W. Sphärische Urgesteine (see references); all other photos: author

Colloids and Limestone: all photos: author

Colloids and Granitoids: all photos: author

Colloids and Serpentinites: 4th and both last photos: Schweiz. Arbeitsgem. für den Naturstein (1999): Naturstein-Muster, Bern; all other photos: author

Colloids and Marble: 8th, 10th, 14th and 16th photo: Schweiz. Arbeitsgem. für den Naturstein (1999): Naturstein-Muster, Bern; all other photos: author

Colloids and Intrusions: all photos: author

Colloids and Xenoliths: all photos: author

Colloids and Quartz Crystals: all photos: author

Orbicular Granites: 1th and 20th photo: postcard from Kangasala; 2nd photo: Bosse, D. Die gemeinsame Evolution… (see references); 3rd, 6th, 8th and 18th photo: Schad, W. Sphärische Urgesteine (see references); 11th und 12th photo: Matthias Bräunlich, Hamburg (www.kristalline-geschiebe.de); 5th, 13th und 14th photo: different websites in the internet; all other photos: author

The Problem of Agates: 3rd, 4th und 15th photo: extraLapis No. 19. München: Weise (see references) and: www.lapis.de; 5th, 6th, 11th und 16th photo: Arnoth J. Achate, Bilder im Stein (see references); all other photos: author

Conglomerates and Breccias: all photos: author

 Why the wealth of forms?: all photos: author

 Dewatering colloids: all photos: author

H2O once different: 1st photo: author; 2nd photo: website in the internet

Self-organization: 7th, 8th, 9th und 10th photo: different websites in the internet; 12th photo: Arnoth J. Achate, Bilder im Stein (see references); 13th und 14th photo: Schad, W. Sphärische Urgesteine (see references); 21th und 22th photo: websites in the internet; all other photos: author

Planetary atmospheres: 1st - 22th photo: different websites in the internet (1st - 19th photo: american and russian space travel and space exploration); last two photos: author

Thoughts about primeval times: 1st photo: author; 2nd photo: Arnoth J. Achate, Bilder im Stein (see references)