The Pierre de Jaumont is an oolitic

Oolite

Oolite is a sedimentary rock formed from ooids, spherical grains composed of concentric layers. The name derives from the Hellenic word òoion for egg. Strictly, oolites consist of ooids of diameter 0.25–2 mm; rocks composed of ooids larger than 2 mm are called pisolites...

 limestone

Limestone

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

 of the Upper Jurassic

Jurassic

The Jurassic is a geologic period and system that extends from about Mya to  Mya, that is, from the end of the Triassic to the beginning of the Cretaceous. The Jurassic constitutes the middle period of the Mesozoic era, also known as the age of reptiles. The start of the period is marked by...

, found in Malancourt-la-Montagne, part of the commune of Montois-la-Montagne

Montois-la-Montagne

Montois-la-Montagne is a commune in the Moselle department in Lorraine in north-eastern France.-See also:*Communes of the Moselle department...

, in Lorraine

Lorraine (région)

Lorraine is one of the 27 régions of France. The administrative region has two cities of equal importance, Metz and Nancy. Metz is considered to be the official capital since that is where the regional parliament is situated...

, France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

.

Jaumont is the shorthand for "Jaune-Montagne" i.e. the "Yellow Mountain". The stone is lovingly called "sunny stone" by locals who enjoy the cheerful sight during gray winter weather.

175 millions year old sand/lime stone. The yellow color comes from iron rust.