[PDF] Volume 26 No. 7 The Gemmological Association and Gem Testing

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Volume 26 No. 7

Th e

Gemmologica

l

Associatio

n an d Ge m

Testin

g

Laborator

y o f Great v

Britai

n

Gemmolog

y

Gemmological Association

an d Gem Testing Laboratory o f Grea t

Britai

n 2 7

Grevill

e

Street

Londo n EC1N 8TN Tel : 020 7404 3334 Fax: 020 7404 8843 e-mail gagtl@btinternet.co m

Website

www.gagtl.ac.uk/gagt l

President

Professo

r R.A. Howie

Vice-Presidents

E.M

Bruton

, A.E. Farn, D.G. Kent, R.K. Mitchell

Honorar

y

Fellows

Che n

Zhonghui

, R.A. Howie, R.T. Liddicoat Jnr, K. Nassau

Honorar

y Lif e

Members

H Bank , DJ. Callaghan, E.A. Jobbins, H. Tillander

Counci

l of Management: T.J

Davidson

, N.W. Deeks, R.R. Harding, I. Mercer, J. Monnickendam, MJ

O'Donoghue

, E. Stern, I. Thomson, V.P. Watson

Members

Council

A.J

Allnutt

P

Dwyer-Hickey

, S.A. Everitt, A.G. Good, J. Greatwood, B . Jackson, L. Music, J.B. Nelson, P.G. Read, R. Shepherd, PJ. Wates, C.H. Winter Branc h

Chairmen

Midland

s - G.M. Green, North West -1. Knight, Scottish - B. Jackson

Examiners

A.J

Allnutt

M.Sc Ph.D. FGA , L. Bartlett, B.Sc., M.Phil., FGA, DGA, E.M

Bruton

, FGA, DGA, S. Coelho, B.Sc, FGA, DGA, Prof. A.T. Collins, B.Sc, Ph.D, A.G Good , FGA, DGA, J. Greatwood, FGA, G.M. Howe, FGA, DGA, B . Jackson, FGA, DGA, G.H. Jones, B.Sc, Ph.D., FGA, M. Newton, B.Sc, D.Phil v CJ.E

Oldershaw

, B.Sc. (Hons), FGA, H.L. Plumb, B.Sc, FGA, DGA, R.D . Ross, B.Sc, FGA, DGA, PA. Sadler, B,Sc, FGA, DGA, E Stern , FGA, DGA, S.M. Stocklmayer, B.Sc (Hons), FGA, Prof. I. Sunagawa, D.Sc, M

Tilley

, GG, FGA, CM. Woodward, B.Sc, FGA, DGA Th e

Journa

l of Gemmology

Editor: Dr R.R. Harding

Assistant

Editors: M.J. O'Donoghue, P.G. Read

Associate

Editors: Dr C.E.S. Arps (Leiden),

G

Bosshar

t (Zurich) , Prof. A.T. Collins (London), Dr J.W. Harris (Glasgow), Prof R.A . Howie (Derbyshire), Dr J.M. Ogden (Cambridge), Prof A.H . Rankin (Kingston upon Thames), Dr J.E. Shigley (Carlsbad), Prof D.C . Smith (Paris), E. Stern (London), S.M. Stocklmayer (Perth), Prof I . Sunagawa (Tokyo), Dr M. Superchi (Milan), CM. Woodward (London)

Production

Editor: M.A. Burland

Vo l 26
, No. 7, July 1999 ISSN: 1355-4565

Review of recent studies on black

jadeit e jad e CM O u Yang 1 an d L i

Hansheng

2

1. Hong Kong Institute ofGemology, Hong Kong

2. Institute of Geology, CAGS, Beijing, RR. China

ABSTRACT:

Blac k jadeit e jade appearin g o n th e Hon g Kon g marke t a s bangles bead s an d pendants consist s mainl y o f jadeit e wit h smal l amount s o f omphaciti c pyroxen e an d accessor y minerals Th e colou r o f th e jad e i s attribute d t o minut e inclusions largel y oquotesdbs_dbs27.pdfusesText_33

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