Bowenite is a hard, compact variety of the

serpentinite Serpentinite is a metamorphic rock composed predominantly of serpentine group minerals formed by serpentinization of mafic or ultramafic rocks. The ancient origin of the name is uncertain; it may be from the similarity of its texture or color ...

species antigorite (Mg₃(OH)O₄Si₂O₅). Classed as a semi-precious gemstone, it has been used for tools, weapons and jewellery by the Māori in

New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...

, and for jewellery by Fabergé. Deposits are found in several places around the world including

Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

and the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. It typically ranges in colour from dark green to light olive green, and in shades approaching yellow. Bowenite was named by James D. Dana in 1850 after George T. Bowen, who analyzed it in 1822. Together with nephrite jade the Māori class bowenite as

pounamu Pounamu is a term for several types of hard and durable stone found in the South Island of 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 ...

, which is also known as ''greenstone'', and is of particular significance to the

Ngāi Tahu Ngāi Tahu, or Kāi Tahu, is the principal Māori people, Māori (tribe) of the South Island. Its (tribal area) is the largest in New Zealand, and extends from the White Bluffs / Te Parinui o Whiti (southeast of Blenheim, New Zealand, Blenhe ...

iwi Iwi () are the largest social units in New Zealand Māori society. In Māori, roughly means or , and is often translated as "tribe". The word is both singular and plural in the Māori language, and is typically pluralised as such in English. ...

on whose traditional lands on the

South Island The South Island ( , 'the waters of Pounamu, Greenstone') is the largest of the three major islands of New Zealand by surface area, the others being the smaller but more populous North Island and Stewart Island. It is bordered to the north by ...

of New Zealand most deposits are found. Historically it was used for tools, weapons and ornaments, although modern use is limited to

jewellery Jewellery (or jewelry in American English) consists of decorative items worn for personal adornment such as brooches, ring (jewellery), rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the ...

, such as

Tiki In Māori mythology, Tiki is the first man created by either Tūmatauenga or Tāne. He found the first woman, Marikoriko, in a pond; she seduced him and he became the father of Hine-kau-ataata. By extension, a tiki is a large or small woo ...

. The South Island deposits are legally protected, and taking material without Ngāi Tahu permission has led to prosecutions. In 1992 Ngāi Tahu approved the 'Pounamu Resource Management Plan' to manage deposits of this commercially valuable resource. Bowenite is the state mineral of the U.S. state of

Rhode Island Rhode Island ( ) is a state in the New England region of the Northeastern United States. It borders Connecticut to its west; Massachusetts to its north and east; and the Atlantic Ocean to its south via Rhode Island Sound and Block Is ...

. Most deposits of bowenite are small, although a large deposit was discovered in South Africa in 1989. Deposits in China are in the

Suzhou Suzhou is a major prefecture-level city in southern Jiangsu province, China. As part of the Yangtze Delta megalopolis, it is a major economic center and focal point of trade and commerce. Founded in 514 BC, Suzhou rapidly grew in size by the ...

region, which accounts for its also being known as ''Suzhou jade'' with carving in elaborate designs.

References

Mindat with mineral data
Phyllosilicates Serpentine group Symbols of Rhode Island Gemstones {{silicate-mineral-stub