Diamond Testing at SSEF (2010)

The Certification of Diamonds at the Swiss Gemmological Institute - SSEF

Jean-Pierre Chalain SSG, May 2010

The Centenary Diamond ( 273.85 ct) A De Beers Group Video

Diamond certification

The weight of each diamond is over 1ct

The girdle of each diamond is faceted

Swiss Gemmological Institute - SSEF

E F G H J L

Forming your own CIBJO diamond master series

S HAPE AN D CUT: Rou n d, b rillant

Forme et taille: rond, b rillant

MIN IMU M WE IG HT: 0.6 00 ct (1 st g ener ation)

Poid s minimum: 0.600 ct (1èr e génér ation)

MIN IMU M WE IG HT: 0.3 00 ct (2 st g ener ation)

Poid s minimum: 0.300 ct (2ème génér ation)

HU E: Y ellow (Cape s e ries )

Teinte: Jaune (sé ri e d ite 'Cap e' )

FLUOR E SCENC E: None or n e gli gible Fluorescenc e: Nulle ou né gligea ble

GIR DL E: polishe d o r fac ete d Ron di ste: po li ou facetté

SY M M ETR Y: Good, Ve r y Good ou Exc ellent

S ym ét rie: B onn e, trè s bonn e ou excellente

POLIS H: Good or Ver y Goo d Poli: Bonn e, très bonn e ou excellente

PU R ITY: No coloured , bl ac k o r o the rwise d i stur bing inclusions Pur eté: Aucune inclusions noires ou gên ante s

C ROW N HE IG HT: < 17 %

P ro po rtion de la couronne: < 17 %

IM PO RTA NT NOT E: A CI B J O M a ste r diamo n d d e fine s the lowe r colour acce pta bl e for a colour gr a de . F or instanc e, a "G " CI B J O M a ste r Diamond d efines the limit b etween the en d of the "G " colour gr a d e a n d the b e ginnin g of the "H" colour gr a de . NOT E IM PO RTA NT E: Un dia m ant étalon CIB J O d éfinit la plus b as se couleur acce pta ble d 'un g r a de d e couleur. Par ex em pl e, un diamant étalon CI B J O " G " dé finit la limite entr e la fin de la couleur "G " et le d é b ut d e couleur " H ".

Swiss Gemmological Institute - SSEF

Diamond certification

Wittelsbach sold $ 24.3 M. at Christie‘s, 11/2008

Pink Diamond natural colour

Diamond certification

For the Swiss Watch Industry

Swiss Gemmological Institute - SSEF

186 emerald cut diamonds for a total weight of 170 ct

Quality Control of small diamonds

Melees quality control

the

Industry

Institute

Clarity Cut

Quality Control of small diamonds

MASTER SERIES FOR SYMMETRY MASTER SERIES FOR CLARITY

MASTER SERIES FOR POLISH

Swiss Gemmological Institute - SSEF

Conclusion

SSEF maintains the highest quality of diamond certification by:

• Keeping the same staff (stability of graders)

• its Research and High Tech Instrumentation

• Working closely to its client needs

Thank you for your attention

Swiss Gemmological Institute - SSEF