J.B. Grading System
Our diamonds pass through rigorous quality control and are assessed finely by qualified craftsmen. Each flawless diamond complies with stringent specifications of color, clarity and shape.
J.B. Grading Chart
A specification schedule to enable user-friendly E-Commerce with J.B. Grading System (JGS)*
Color
(Col)
D to O and fancy colors ("+"Sign for color e.g.: H+, H,I+,I,J+,J)
Color shade
(Cs)
Many times it has been noticed that a stone has a color shade apart from its actual Color to give you a brief idea of the same we have added different color shade
  • (BR) Brownish
  • (BL) Bluish
  • (GR) Greenish
  •  
  • (GB) Greenish brown
  • (PN) Pinkish
  • (GY) Grayish
  • (FT) Fancy Tinch
FBR = Faint (very light)Brownish Tinch
LBR = Light Brownish Tinch.
BR = Brownish Tinch
Note.: Similarly for all other shades, we are mentioning details about the tinch in three categories.
CARAT
From 0.30 carats to 10 carats, specializing in 0.50 carats to 3 carats.
CLARITY
(CLA)
CLARITY
  • IF
  • VVS1, VVS2
  • VS1+, VS1
  • VS2+, VS2
  • SI1+, SI1, SI1-
  • SI2+, SI2, SI2-
  • SI3+, SI3, SI3-
  • I1+, I1, I1-
  • I2+, I2, I2-
  • I3+, I3, I3-
TABLE INCLUSION (TI)
  • (T0) Center Clean
  • (T1) Minor Inclusion
  • (T2) Medium Inclusion
  • (T3) Major Inclusion
  • (T4) Heavy Inclusion
BLACK INCLUSION ON CENTER (BIC)
BLACK INCLUSION ON SIDE (BIS)
  • (B0) Not Visible
  • (B1) Minor Inclusion
  • (B2) Medium Inclusion
  • (B3) Major Inclusion
  • (B4) Heavy Inclusion
OPEN ON TABLE (OPTA)
OPEN ON CROWN (OPCR)
OPEN ON PAVILION (OPPV)
  • (O1) Very Small
  • (O2) Small
  • (O3) Heavy
TYPE OF INLUSION (TOI)
  • (A) Very Light of Soft Inclusion
  • (B) Soft Inclusion
  • (C) Normal Inclusion
  • (D) Hard Inclusion
  • (E) Very Hard Inclusion
EYE CLEAN (EC)
  • (E1) Eye Clean
  • (E2) Semi Eye Clean
CUT
CUT (PROP)
  • (ID) Ideal
  • (EX) Excellent
  • (VG) Very Good
  • (GD) Good
  • (FR) Fair
HEARTS & ARROWS (HA)
  • (EX) Excellent
  • (VG) Very Good
  • (GD) Good
  • (FR) Fair
LASER INSCRIPTION OF
HEARTS & ARROWS (H&A)
  • We provide laser inscription of
  • H&A in diamonds having Hearts & Arrows
  • (EI) Excellent- Inscription of H&A
  • (VI) Very Good- Inscription of H&A
  • (GI) Good- Inscription of H&A
SYMMETRY (SY)
POLISH (PO)
  • (ID) Ideal
  • (EX) Excellent
  • (VG) Very Good
  • (GD) Good
JGS*
EXTRA
PARAMETERS
EXTRA FACETS ON CROWN (EFCR)
EXTRA FACETS ON PAVILION (EFPV)
  • (NV) Not Visible
  • (MN) Minor
  • (MD) Medium
  • (MJ) Major
LUSTER (LU)
  • (L1) Very Good
  • (L2) Good
  • (M1) Light Milky
  • (M2) Medium Milky
  • (M3) Heavy Milky
CULET (CU)
  • (PO) Pointed
  • (MD) Medium
  • (FC) Faceted
  • (BR) Broken
FLUORESCENCE (FL)
  • (N) None
  • (F) Faint/ Very Slight
  • (M) Medium/ Slight
  • (S) Strong
  • (VS) Very Strong
KNOT
  • (Y) Yes
GRAINING (GR)
  • (IG) Internal Graining
  • (SG) Surface Graining
FLUORESCENCE
COLOR (FC)
  • (YL) Yellow
  • (BL) Blue
  • (WT) White
  • (OR) Orange
  • (GR) Green
GIRDLE (GRD)
  • (F) Faceted
  • (NF) Non- Faceted
Copyright 2018 J.B. And Brothers - All Rights Reserved
is a trademark used under licence from the De Beers group of companies
J. B. And Brothers Pvt. Ltd. is a Group Company of Yaelstar B.V.B.A., a Sightholder of the De Beers Group of Companies