(click on thumbnails to enlarge pictures)

USA - Wyoming, Farson, rattan palm, Eocene, agate additions, diameter 2,5 cm USA - Wyoming, Farson, rattan palm, Eocene, agate additions, diameter 3,5 cm USA - Wyoming, Farson, rattan palm, Eocene, agate additions, diameter 4 cm
USA - Washington,
Cedroxylon sp. (cedar), Miocene,
diameter 11,5 cm
USA - Utah, Garfield County, Hansen Creek, Red Wood, many knots on the surface, wholly agatized, Jurassic, diameter 3 - 5 cm, lenght 4,5 cm
USA - Washington,
Cupressinoxylon sp.
(cypress), Miocene,
diameter 10 - 12 cm
USA - Washington,
coniferous, Miocene,
diameter 11 - 12 cm
USA - Washington,
Taxodioxylon sp.
(blad cypress), Miocene,
diameter 6,5 - 9 cm
USA - Illinois,
Vermilion County,
Psaronius sp.,
Carboniferous,
diameter 11 - 17 cm
USA - Utah, Wayne County, Wide Hollow, coniferous, Jurassic,
10 x 6,5 cm
USA - Utah, Garfield County, Hansen Creek, Red Wood, Jurassic,
8,5 x 5,5 cm
USA - South Texas, Catahoula Formation,
Cyathodendron texanum (fern), Eocene/Oligocene,
diameter 5 - 7,5 cm
USA - South Texas, Catahoula Formation,
Cyathodendron texanum (fern), Eocene/Oligocene,
diameter 7,5 cm
USA - Oregon, Crooked River, agatized wood,
8,5 x 4 cm
USA - Oregon, Sweet Home, Little Butte Formation, Prunioxylon sp., quartz pseudomorph after halite, Oligocene,
diameter 10 - 13 cm
USA - Wyoming, Farson, Green River Formation, rattan palm, Eocene,
diameter 4 cm
USA - Wyoming, Farson, Green River Formation, rattan palm, Eocene,
diameter 2,5 - 3 cm
USA - California, Granger Creek, Warner Basalts Formation, Pinuxylon sp., Miocene,
diameter 7 cm
USA - Washington, Saddle Mountain, Columbia Group Basalts, Sequoiaxylon sp., picture wood, Miocene,
diameter 13 - 14,5 cm
USA - Arizona, Tuba City, Chinle Formation,
Woodworthia sp., Triassic,
diameter 15,5 - 27 cm
USA - Wyoming, agatized specimen, Eocene,
diameter 1,5 cm
USA - Wyoming, three agatized limbs, Eocene,
diameter 2 cm, len. 4,5 cm
USA - Wyoming, Palmoxylon sp., Eocene, lenght 7,5 cm
USA - Wyoming, Green River Formation, Acrostichum sp., petiole, Eocene, diameter 1 cm, lenght 7 cm USA - Utah, Henry Mountains, coniferous wood, veins of carnelian, Jurrasic, diameter 5 - 6 cm USA - Wyoming, Yellow Point Playa, deciduous wood, Eocene,
lenght 7 cm
USA - Utah, Henry Mountains, coniferous wood, Jurrasic, diameter
6,5 - 8,5 cm
USA - Wyoming, Yellow Point Playa, deciduous wood, Eocene, diameter
2 cm, lenght 4,5 cm
USA - Wyoming, Yellow Point Playa, deciduous wood, veins of agate, Eocene, lenght 6,5 cm
USA - Wyoming, Yellow Point Playa, deciduous wood, Eocene, lenght 4 cm USA - Wyoming, Green River Formation, Acrostichum sp., Eocene, diameter 1,5 - 2 cm,
lenght 11 cm
USA - Wyoming, Green River Formation, Acrostichum sp., whole agated specimens, Eocene, diameter 1,5 cm,
lenghts 5 and 8 cm
USA - southern Utah, Chinle Formation, coniferous, specimen attacked by unidentified fungi, Triassic, diameter 11,5 - 16 cm USA - Arizona, Chinle Formation, coniferous (known as "Araucarioxylon arizonicum"), specimen attacked by fungi Polyporites wardii, Triassic,
10 x 13 cm
USA - Arizona, Chinle Formation, coniferous (known as "Araucarioxylon arizonicum"), specimen attacked by fungi Polyporites wardii, Triassic,
7 x 15 cm
USA - Arizona, Chinle Formation, Schilderia adamanica, Triassic,
diameter 6 - 9,5 cm
USA - Arizona, Chinle Formation, Schilderia adamanica, Triassic,
diameter 17 - 25,5 cm
USA - South Dakota, Orella Formation, Hackberry Seeds, Celtis occidentalis, Oligocene, diameter
about 5 mm
USA - Arizona, Chinle Formation, Schilderia adamanica, Triassic, diameter 12 - 25 cm USA - Arizona, Chinle Formation, coniferous, Triassic,
diameter 9,5 - 13 cm
USA - Louisiana, Catahoula Formation, Palmoxylon sp., Oligocene/Miocene,
diameter 16,5 - 20,5 cm
USA - Nevada, Virgin Valley, Humboldt County, coniferous wood, Miocene, opalized specimen,
diameter 5,5 - 6 cm
USA - Utah, San Juan County, Jurrasic, coniferous wood, pirytized specimen, diameter 3 - 4 cm,
lenght 13 cm
USA - Nevada, Virgin Valley, Humboldt County, Miocene, diameter 1,5 cm, lenght 4 cm
USA - Oregon, near Prineville, Crooked River, Limb Cast, Tertiary, whole agatized specimen, diameter 6 - 7 cm,
lenght 9 cm
USA - Colorado, Morrison formation, Hermanophyton sp., Jurrasic (206 - 142 mya), quartz mineralisation, complete section,
diameter 5,5 - 6,5 cm
USA - North Wyoming,
Limb Cast - agatized branch, Eocene,
diameter 7,5 cm
USA - Oregon, Swartz Canyon, near Prineville, Quercoxylon sp., Miocene, quartz mineralisation,
diameter 9 - 11 cm
USA - North Arizona, Chinle Formation, coniferous (known as "Araucarioxylon arizonicum"), Rainbow wood, 225 mya (Triassic),
diameter 15 - 18,5 cm
USA - Wyoming, Bridger Formation, 48 mya (Eocene), agate included,
5 x 10 cm
USA - Wyoming, Bridger Formation, petrified root,
48 mya (Eocene),
diameter 7 - 9,5 cm
USA - Wyoming, Bridger Formation, Palmoxylon sp., 48 mya (Eocene),
agate included,
diameter 15 - 18 cm
USA - Texas, Mc Mullen County, Catahoula Formation,
Palmoxylon sp., Oligocene,
diameter 7 - 8,5 cm
USA - Wyoming, Lincoln County, Laurinoxylon sp., Eocene, quartz mineralisation,
complete section,
diameter 7 - 9 cm
USA - North Dakota, Morton County, Cannonball Formation, Sequoia dakotensis (petrified cone of sequoia tree), Cretaceous,
height 2 cm
USA - Wyoming, Schinoxylon sp., Eocene, quartz mineralisation, agate and quartz crystals included,
complete section,
diameter 8,5 - 10 cm
USA - Arizona, Chinle formation, Woodworthia arizonica, triassic, quartz mineralisation,
complete section,
diameter 20 - 25 cm
USA - Wyoming (Uinta County), Bridger formation, Populoxylon sp., Eocene, quartz-agate mineralisation,
complete section,
diameter 11 cm
USA - Wyoming, quartz mineralisation, complete section, 12 x 12 cm

USA - Wyoming, Blue Forest, near Farson, Palmoxylon sp., Eocene, agate and calcite additions, quartz mineralisation, complete section, diameter
13 - 17 cm
USA - Washington, Sunnyside, Yakima Basalts formation, Populoxylon sp., 25 mya (Oligocene), quartz mineralisation, complete section, diameter 10 cm USA - Oregon, Hampton Butte, Eocene/Oligocene (55 - 24 mya), mixed mineralisation,
10,5 x 7 cm

USA - Oregon, Nevada, McDermitt, locust or ash, Tertiary, agate-quartz mineralisation, complete section, diameter
9 - 11 cm
USA - Nevada, Hubbart Basin, Conifer, Tertiary, highly agatized, complete section, 12 x 26 cm USA - Utah, Mesozoic, quartz crystals and bands of red-grey agate, piece of branch, diameter 4 - 6 cm, height 7 cm

USA - Colorado, Cortez, Morrison formation, Hermanophyton sp., Jurrasic (206 - 142 mya), quartz mineralisation, complete section, diameter 5,5 - 6 cm USA - Wyoming, Farson, Acrostichum sp., Eocene (55 - 34 mya), highly agatized specimen, vascular cell bundles visible USA - Oregon, Hampton Butte, Eocene/Oligocene (55 - 24 mya), jasper-agate mineralisation, complete section, diameter
12,5 - 16 cm


USA - Wyoming, "Blue Forest", Schinoxylon sp., 52 mya (Eocene), wood coated with algae, quartz mineralisation with blue agate, complete section,
16,5 x 10,5 cm
USA - Wyoming, "Blue Forest", Eocene (55 - 34 mya), wood coated
with algae, quartz mineralisation with blue agate, calcite additions, complete section,
10 x 6,5 cm
USA - Nevada, Cherry Creek, coniferous, Neogene/Paleogene,
quartz mineralisation,
complete section,
7,5 x 5,5 cm


USA - Wyoming, "Blue Forest", Schinoxylon sp., 52 mya (Eocene), quartz mineralisation,
white and yellow calcite additions, blue agate with
small crystalls of quartz, complete section, 10,5 x 8 cm
USA - Wyoming, "Blue Forest", Schinoxylon sp., 52 mya (Eocene), quartz mineralisation with blue agate, orange calcite additions, diameter
11 - 12 cm
USA - Wyoming, "Blue Forest", Schinoxylon sp., 52 mya (Eocene), quartz mineralisation, spaces with botryoidal blue agate, complete section, diameter 14 - 17,5 cm

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