The Four C`s Diamonds are Graded according to four criteria. Carat is weight of the stone. One Carat=0.2 Gram or 200 milligrammes.     Point is one hundredth of a Carat Colour is actually a measure of the molecular impurities in the stone From D (Clear) to Z (Yellow). Clarity is a measure of the internal structure of the stone. From IF (a Perfect stone) to I3 (obvious Imperfections). Cut refers to the shape that the stone is cut into. The Cut is a pattern designed to maximize the internal reflections. Thus Cut refers to the shape and how closely the stone matches the shape pattern. Certificate is the value of the stone as determined by a qualified diamond valuer. The value of the diamond can fluctuate as diamond values fluctuate in world markets but a diamond with a certificate will be worth more than an uncertified diamond.

Colour chart

Highest Value to Lowest Value
Colourless	Near Colourless	Faint Yellow	Very Light Yellow	Light Yellow
D E F	G H I J	K L M	N O P Q R	S T U V W X Y Z

Clarity Chart

IF	Internally Flawless No internal imperfections (inclusions)and only very insignificant external imperfections (blemishes) at 10X mag.
VVS1	Very Very Small inclusions which are extremely difficult to see at 10X mag.
VVS2	Very Very Small inclusions which are very difficult to see at 10X mag.
VS1	Very Small inclusions which are somewhat difficult to see at 10X mag.
VS2	Very Small inclusions which are somewhat easier to see at 10X mag.
SI1	Slight inclusions easily visible at 10X mag. but invisible to the unaided eye.
SI2	Slight inclusions which can be seen by the unaided eye from the back of the diamond but not through the top of the diamond
I1	Imperfect imperfections slightly visible to the eye.
I2	Imperfect imperfections Imperfect imperfections
I3	Imperfect imperfections obvious to the eye.
I2 and I3 diamonds usually have large and/or numerous imperfections which reduce a diamond's durability if worn in rings on an every day basis.

Cut Chart

Diamond Enquiries to Paul Stephenson  @  Walsh brothers

Walsh Brothers 118 - 120 High Street Beckenham Kent   BR3 1EB England

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