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Chalcedony Gallery

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Multiple photos availableChalcedony

Ahaggar Mts (Hoggar Mts), Tamanghasset Province, Algeria

Translucent brown chalcedony.
Specimen size 5.1 x 4.1 x 3.6 cm.
See second image.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 162949    View Count: 254

Chalcedony

Ahaggar Mts (Hoggar Mts), Tamanghasset Province, Algeria

FOV ~ 5.3 x 4 cm.
 © Christian BrackePhoto ID: 183504    View Count: 141

Chalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Cut sample and polished with 6,5x5x2cm - July of 1974
 © Martins da PedraPhoto ID: 48535    View Count: 686

Chalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Sample cut with 4x2,5x1cm - April of 1973
 © Martins da PedraPhoto ID: 68667    View Count: 688

Chalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Sample with 2,5cm - April of 1973
 © Martins da PedraPhoto ID: 71615    View Count: 408

Multiple photos availableChalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Sample cut with 4,5x2,5x1cm - April of 1973
 © Martins da PedraPhoto ID: 89789    View Count: 343

Chalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Sample cut with 3x2,5x1cm - April of 1973
 © Martins da PedraPhoto ID: 89786    View Count: 240

Chalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Agate- Cut sample and polished with 14,5x8,5x4,5cm. July of 1974
 © Martins da PedraPhoto ID: 39438    View Count: 886

Chalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Cut sample and polished with 4X3X1,5cm - April of 1973
 © Martins da PedraPhoto ID: 48541    View Count: 587

Chalcedony (Var: Agate) : SiO2

M'banza Congo (Mbanza Congo; Mbanza Kongo; San Salvador; São Salvador; São Salvador do Congo), Zaire Province, Angola

Cut sample and polished with 3x3,5x4cm - July of 1974
 © Martins da PedraPhoto ID: 48537    View Count: 529
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Mineral and/or Locality
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