RCIN and OZwRCIN projects


Chocolate' flint : 2D documentation

Resource type:



Chocolate' flint : 2D documentation

Type of object:

Geological sample

Archaelogical site:

Polany II, chocolate flint mine

Location- administrative unit (present):

Polany, Radom district, Mazowieckie province, Poland

Topographic location:

northeastern edging of Świętokrzyskie Mountains

Object type:

siliceous rocks ; flint

Characteristics of the object- technique:


Characteristics of the object- raw material:

Upper Jurassic flint

Characteristics of the object- colour:

10 YR 3/2

Characteristics of the object- transparency:

3 – translucent and 4 - transparent

Characteristics of the object- fracture:


Characteristics of the object- texture/facture:

silica matrix with visible numerous inclusions of different size; in the central part visible inclusion of chalcedony; slurry unevenly spread, arranged in clusters

Characteristics of the object- luster:


Characteristics of the object- cortex:

thin, smooth, under 1mm

Characteristics of the object- transition:

clear transition

Characteristics of the object- patina:


Characteristics of the object- colour of patine:


Characteristics of the object- width:

91 mm

Characteristics of the object- thickness:

26 mm

Characteristics of the object- length:

99 mm

Characteristics of the object- weight:

308 g

Object description:

First charactristics of chocolate flint containing an attempt to determine distinct features for flint of "Zele" type from Wierzbica mine was given by R. Schild (1971). There were three levels of occurrence of flint concretions at the Wierzbica „Zele” site. They occurr in two types – as large plates and as nodule-like concretions. Raw material extracted at Wierzbica „Zele” site differs from other similar varieties of chocolate flint by weaker lustre and the occurrence of clear demarcation between black and brown chocolate colour in the flint mass of some part of concretions

Research Manager/ Creator of Collection:

Lech, Jacek

Accession number:



Upper Jurassic


Atlas skał

Detailed Resource Type:

Research data

Resource Identifier:



Creative Commons Attribution BY-SA 3.0 PL license

Terms of use:

Copyright-protected material. [CC BY-SA 3.0 PL] May be used within the scope specified in Creative Commons Attribution BY-SA 3.0 PL license, full text available at: ; -

Digitizing institution:

Institute of Archaeology and Ethnology of the Polish Academy of Sciences

Original in:

Institute of Archaeology and Ethnology of the Polish Academy of Sciences

Projects co-financed by:

Operational Program Digital Poland, 2014-2020, Measure 2.3: Digital accessibility and usefulness of public sector information; funds from the European Regional Development Fund and national co-financing from the state budget. ; European Union. European Regional Development Fund



Object collections:

Last modified:

Jul 8, 2022

In our library since:

Oct 13, 2021

Number of object content downloads / hits:


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Edition name Date
Krzemień czekoladowy : dokumentacja [2D] Jul 8, 2022


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