Greenstone is a common generic term for valuable, green-hued minerals and metamorphosed

igneous rock Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main The three types of rocks, rock types, the others being Sedimentary rock, sedimentary and metamorphic rock, metamorphic. Igneous rock ...

s and stones which early cultures used in the fashioning of

hardstone carving Hardstone carving is a general term in art history and archaeology for the artistic carving of predominantly semi-precious stones (but also of gemstones), such as jade, rock crystal (clear quartz), agate, onyx, jasper, serpentinite, or carnelian, ...

s such as jewelry, statuettes, ritual tools, and various other artifacts. Greenstone artifacts may be made of

greenschist Greenschists are metamorphic rocks that formed under the lowest temperatures and pressures usually produced by regional metamorphism, typically and 2–10 kilobars (). Greenschists commonly have an abundance of green minerals such as chlorite ...

chlorastrolite Chlorastrolite, also known as Isle Royale Greenstone, is a green or bluish green stone.Arguably the rarest gemstone in the world and one of the most valuable American gemstones. The gem quality specimens are typically found on Isle Royale, a large ...

, serpentine,

omphacite Omphacite is a member of the clinopyroxene group of silicate minerals with formula: ( Ca, Na)( Mg, Fe2+, Al) Si2 O6. It is a variably deep to pale green or nearly colorless variety of clinopyroxene. It normally appears in eclogite, which is the ...

chrysoprase Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel. Its color is normally apple-green, but varies to deep green. The darker varieties of chry ...

olivine The mineral olivine () is a magnesium iron silicate with the chemical formula . It is a type of nesosilicate or orthosilicate. The primary component of the Earth's upper mantle, it is a common mineral in Earth's subsurface, but weathers quickl ...

nephrite Nephrite is a variety of the calcium, magnesium, and iron-rich amphibole minerals tremolite or actinolite (Aggregate (geology), aggregates of which also make up one form of asbestos). The chemical formula for nephrite is calcium, Ca2(magnesium, ...

chloromelanite Jadeite is a pyroxene mineral with composition Na Al Si2 O6. It is hard (Mohs hardness of about 6.5 to 7.0), very tough, and dense, with a specific gravity of about 3.4. It is found in a wide range of colors, but is most often found in shades ...

among other green-hued minerals. The term also includes

jade Jade is a mineral used as jewellery or for ornaments. It is typically green, although may be yellow or white. Jade can refer to either of two different silicate minerals: nephrite (a silicate of calcium and magnesium in the amphibole group of ...

and

jadeite Jadeite is a pyroxene mineral with composition sodium, Naaluminium, Alsilicon, Si2oxygen, O6. It is hard (Mohs hardness of about 6.5 to 7.0), very tough, and dense, with a specific gravity of about 3.4. It is found in a wide range of colors, bu ...

, although these are perhaps more frequently identified by these latter terms. The greenish hue of these rocks generally derives from the presence of minerals such as

chlorite The chlorite ion, or chlorine dioxide anion, is the halite with the chemical formula of . A chlorite (compound) is a compound that contains this group, with chlorine in the oxidation state of +3. Chlorites are also known as salts of chlorous ac ...

hornblende Hornblende is a complex inosilicate series of minerals. It is not a recognized mineral in its own right, but the name is used as a general or field term, to refer to a dark amphibole. Hornblende minerals are common in igneous and metamorphic rocks ...

, or

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 habi ...

.Kipfer (2000, p.218) Greenstone minerals were presumably selected for their color rather than their chemical composition. In

archaeology Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscap ...

therefore, having a loosely applied general term is at least partially influenced by the observation that ancient cultures often used and considered these various green-hued materials as interchangeable. Greenstone objects are often found very considerable distances from the source of the rock, indicating early travel or trading networks. A polished jadeite axe head in the

British Museum The British Museum is a public museum dedicated to human history, art and culture located in the Bloomsbury area of London. Its permanent collection of eight million works is among the largest and most comprehensive in existence. It docum ...

(4000-2000 BCE) was found in

Canterbury, Kent Canterbury (, ) is a cathedral city and UNESCO World Heritage Site, situated in the heart of the City of Canterbury local government district of Kent, England. It lies on the River Stour. The Archbishop of Canterbury is the primate of the ...

but uses stone from the Alps of Northern Italy, and objects from other parts of the world had travelled comparable distances to their findspots.British Museum
, "Axe" Acq. 1901,0206.1 Ancient China and

Mesoamerica Mesoamerica is a historical region and cultural area in southern North America and most of Central America. It extends from approximately central Mexico through Belize, Guatemala, El Salvador, Honduras, Nicaragua, and northern Costa Rica. W ...

have special reputations for the prevalence and significance of greenstone (particularly jade) usage. Greenstones also figure prominently in the indigenous cultures of southeastern

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

, and among the

Māori Māori or Maori can refer to: Relating to the Māori people * Māori people of New Zealand, or members of that group * Māori language, the language of the Māori people of New Zealand * Māori culture * Cook Islanders, the Māori people of the C ...

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

(who knew greenstone as ''

pounamu Pounamu is a term for several types of hard and durable stone found in southern New Zealand. They are highly valued in New Zealand, and carvings made from pounamu play an important role in Māori culture. Name The Māori word , also used ...

''). Neolithic Europe also used greenstone, especially for prestige versions of axe tools, not made for use; comparable jade versions of tools and weapons also appeared in the

Olmec The Olmecs () were the earliest known major Mesoamerican civilization. Following a progressive development in Soconusco, they occupied the tropical lowlands of the modern-day Mexican states of Veracruz and Tabasco. It has been speculated that t ...

and other

Pre-Columbian cultures This list of pre-Columbian cultures includes those civilizations and cultures of the Americas which flourished prior to the European colonization of the Americas. Cultural characteristics Many pre-Columbian civilizations established permanent o ...

and in early Chinese civilization.

Gallery of greenstone versions of tools or weapons

File:British Museum jadeite axe.jpg, Neolithic

axe head, found in England but made from stone from the Italian Alps File:WLA haa China Neolithic Ritual Blades Dao nephrite.jpg, Nephrite ritual blade from Neolithic China Image:Tobago jade ceremonial ax.jpg, Greenstone ceremonial axe from

Tobago Tobago () is an List of islands of Trinidad and Tobago, island and Regions and municipalities of Trinidad and Tobago, ward within the Trinidad and Tobago, Republic of Trinidad and Tobago. It is located northeast of the larger island of Trini ...

Gallery of greenstone versions of tools or weapons

Notes

External links

References