Lapis Lacedaemonius (), also known as Spartan basalt, is a form of

andesite Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predomina ...

or volcanic rock known today only from a single source in the village of

Krokees Krokees (, before 1927: Λεβέτσοβα - ''Levetsova'') is a village and a former municipality in Laconia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Evrotas, of which it is a municipal unit. The ...

on the

Peloponnese The Peloponnese ( ), Peloponnesus ( ; , ) or Morea (; ) is a peninsula and geographic region in Southern Greece, and the southernmost region of the Balkans. It is connected to the central part of the country by the Isthmus of Corinth land bridg ...

in Greece. In addition, ancient sources mention a quarry of lapis Lacedaemonius in

Taygetus The Taygetus, Taugetus, Taygetos or Taÿgetus () is a mountain range on the Peloponnese peninsula in Southern Greece. The highest mountain of the range is Mount Taygetus, also known as "Profitis Ilias", or "Prophet Elias" (Elijah). The name is o ...

. The stone has a dark green colour, speckled with elements shifting from yellow to light green. Occasionally, the speckles have crystallised in a way that creates rosette-like patterns. It is rated as having a hardness of six or higher on the

Mohs scale of mineral hardness The Mohs scale ( ) of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by the Ger ...

. It appears in comparatively small blocks. It is known in Italian as ''porfido verde antico'' and in German as ''Krokeischer Stein''. The stone is known to have been processed by

Neanderthal Neanderthals ( ; ''Homo neanderthalensis'' or sometimes ''H. sapiens neanderthalensis'') are an extinction, extinct group of archaic humans who inhabited Europe and Western and Central Asia during the Middle Pleistocene, Middle to Late Plei ...

s. In slightly more recent times, lapis Lacedaemonius has been used for making

Minoan sealstone Minoan seals are impression seals in the form of carved gemstones and similar pieces in metal, ivory and other materials produced in the Minoan civilization. They are an important part of Minoan art, and have been found in quantity at specific si ...

s and vases, both

Minoan The Minoan civilization was a Bronze Age culture which was centered on the island of Crete. Known for its monumental architecture and Minoan art, energetic art, it is often regarded as the first civilization in Europe. The ruins of the Minoan pa ...

and Mycenean. It also was used as an element in decorative elements created with

opus sectile ''Opus sectile'' is a form of '' pietra dura'' popularized in the ancient and medieval Roman world where materials were cut and inlaid into walls and floors to make a picture or pattern. Common materials were marble, mother of pearl, and gla ...

technique (with examples known from

Ostia Antica Ostia Antica () is an ancient Roman city and the port of Rome located at the mouth of the Tiber. It is near modern Ostia, southwest of Rome. Due to silting and the invasion of sand, the site now lies from the sea. The name ''Ostia'' (the pl ...

and

Nemi Nemi is a town and ''comune'' in the Metropolitan City of Rome (central Italy), in the Alban Hills overlooking Lake Nemi, a volcanic crater lake. It is northwest of Velletri and about southeast of Rome. The town's name derives from the Lati ...

) during Roman times, as well as in several churches in

Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...

(e.g.

Santa Prassede The Basilica of Saint Praxedes (, ), commonly known in Italian as Santa Prassede, is an early medieval titulus (Roman Catholic), titular church and minor basilica located near the papal basilica of Saint Mary Major, on Via di Santa Prassede, Mont ...

) and in the pavement of St. Peter's Square. Its use is mentioned by Pausanias. During the

Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...

it was employed in mosaics in e.g.

Palermo Palermo ( ; ; , locally also or ) is a city in southern Italy, the capital (political), capital of both the autonomous area, autonomous region of Sicily and the Metropolitan City of Palermo, the city's surrounding metropolitan province. The ...

Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...

, and

Santiago de Compostela Santiago de Compostela, simply Santiago, or Compostela, in the province of Province of A Coruña, A Coruña, is the capital of the autonomous communities of Spain, autonomous community of Galicia (Spain), Galicia, in northwestern Spain. The city ...

. Furthermore, Roman and Byzantine decorative stones frequently were reused up until the eighteenth century. For example, in

St. Mark's Basilica The Patriarchal Cathedral Basilica of Saint Mark (), commonly known as St Mark's Basilica (; ), is the cathedral church of the Patriarchate of Venice; it became the episcopal seat of the Patriarch of Venice in 1807, replacing the earlier cathed ...

Venice Venice ( ; ; , formerly ) is a city in northeastern Italy and the capital of the Veneto Regions of Italy, region. It is built on a group of 118 islands that are separated by expanses of open water and by canals; portions of the city are li ...

and also as far away from the

Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Eur ...

as in

Westminster Abbey Westminster Abbey, formally titled the Collegiate Church of Saint Peter at Westminster, is an Anglican church in the City of Westminster, London, England. Since 1066, it has been the location of the coronations of 40 English and British m ...

London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

. The stone from Krokees comes from a

lava dome In volcanology, a lava dome is a circular, mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions ...

approximately 230 million years old. Its light spots are

plagioclase Plagioclase ( ) is a series of Silicate minerals#Tectosilicates, tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continu ...

, which over time has turned into

albite Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. It represents a plagioclase with less than 10% anorthite content. The pure albite endmember has the formula . It is a tectosilicat ...

and

epidote Epidote is a calcium aluminium iron sorosilicate mineral. Description Well developed crystals of epidote, Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH), crystallizing in the monoclinic system, are of frequent occurrence: they are commonly prismatic in ha ...

. In places, iron minerals have oxidized into

hematite Hematite (), also spelled as haematite, is a common iron oxide compound with the formula, Fe2O3 and is widely found in rocks and soils. Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of . ...

, giving it a reddish tone. Geologically similar rock, equally exploited during antiquity, may be found on

Samothrace Samothrace (also known as Samothraki; , ) is a Greek island in the northern Aegean Sea. It is a municipality within the Evros regional unit of Thrace. The island is long, in size and has a population of 2,596 (2021 census). Its main industries ...

References

External links

{{Commonscat, Verde Antico
Porfido Verde Antico
Article about Lapis Lacedaemonius in ''Architettura di pietra''. (in Italian) Andesite Geology of Greece Laconia