Materials and Stones

Silver:

All the silver we use is hallmarked sterling silver ensuring the highest quality and standards.

Yellow Gold:

Our products are available in all carats; 9ct, 14ct & 18ct. The higher the carat, the more pure and brighter the gold will be. All yellow gold is fully hallmarked.

White Gold:

White gold is yellow gold alloyed with other metals to become white. To get a shiny, bright white colour the white gold is Rhodium plated. Rhodium will wear off after time so it simply needs to be refinished. All white gold is fully hallmarked.

 The Assay Stamp:

The stones used:

Diamonds:

Diamond is the hardest natural material known to man; a form of carbon that crystallises hundreds of miles under the surface of the earth.  The word 'diamond' is derived from the ancient Greek 'Adams', meaning 'invincible'.

Tom is passionate about diamonds; he says that 'they have a fiery brilliance and lustre making them cherished above all other gemstones'. Only the finest, ideal cuts are hand picked to go into our jewellery and all of our diamonds are conflict free.

If you wish to have a specific stone shape, size, colour or clarity please call or email and we will find the perfect diamond for you.

When buying diamonds you need to look at the Four C's - Cut, Colour, Clarity and Carat:

The Cut refers to the shape of each diamond. Diamonds are cut to their optimum shape. The different basic cuts are: brilliant cut (round), princess cut (square), emerald cut (rectangular), marquise (pointed oval), oval (oval), baguette (thin rectangle), heart (heart shaped) and pear (pear shaped).

The Colour is generally considered the most important characteristic of a gemstone and it is one of the key factors to be considered when determining the value of a diamond. The ideal colour is the total absence of all body colour (clear) except in fancy colours such as yellow, pink, blue, green, champagne, black and, a very rare, red. A precise scale of colour grading is in general use today that is defined by the GIA (Gemmological Inistute of America).

The Clarity is the degree of flawlessness, defined through the study of imperfections and inclusions. The stone is examined using x10 magnification. Almost all diamonds have traces of non-crystallised carbon or small non diamond crystals. This is by no means a bad thing as it gives the stone its own natural fingerprint. However the fewer imperfections there are, the rarer the gemstone is. The grading is defined by:

IF:  Internally Flawless (loop clean). The diamond grading expert finds no internal defects with a x10 loop.

VVS1 VVS2:  Very, Very Small internal defects detected only by the x10 loop.

VS1 VS2:  Very small internal defects, again very difficult to determine defects.

S1 S2 :  Easy enough for the expert to see without any difficulty.

I1 I2 I3:  Large internal defects that can be seen with the naked eye.

The Carat relates to the size of a diamond although the carat is a unit of weight as opposed to actual size. One carat (1ct) weighs 200 milligrams. It is divided into 100 points, so a 50 point diamond is half a carat.   

If you do have any questions about the diamonds we use, Tom will be very happy to speak to you.

Peridot (green):

Peridot has a lovely rich oily colour. The colour can vary from a pale translucent to a dark, deep yellow-green. All stones used are a clean medium green. Peridot is associated with the astrological sign of Libra and was the lovers' stone in the Baroque Era. Peridot is believed to help cure liver disease and dropsy, to free the mind from envious thoughts, dispel terrors of the night and also to protect people from misfortune and heartache.

Topaz (blue):

Topaz can come in yellow, pink, green or blue. The blue topaz stones I choose are heat treated to give them a deeper colour. Topaz is said to calm stormy seas, endow men with wisdom, generosity and intellect and women with beauty and fertility.

Citrine (yellow):

Citrine is a yellow quartz. Almost all citrine is heat treated to improve its colour. The stone is said to promote good digestion as well as the healthy function of both the liver and the pancreas. The stone discharges energy in water and recharges in sunlight.

Tourmaline (pink):

Tourmaline comes in many colours, mainly green, blue-green and pink. Here, at Tom Harrison Jewellery, Tom uses mainly pink. Often two colours can be found side by side in pink and green, known as watermellon tourmaline. The stone is thought to help the memory and prevent vertigo. Tourmaline  also discharges energy in water and recharges in sunlight.

 

Technical Information

Mechanical and One Piece Cufflinks

There are two main types of cufflinks: one piece which is a solid piece (as shown on the left), and mechanical which is hinged (shown on the right). Each person has their own preferences; there is no 'better' or 'easier' cufflink to wear. So, wherever possible, Tom has designed both types of cufflinks so that you may make the choice.

  

Ring sizes

Ring sizes can be a bit confusing. If you are not certain about sizes, please feel free to email, or phone.

British sizes

European sizes (mm)

International diameter (mm)

G

 

14.4

G ½

46

14.6

H

 

14.8

H ½

47

15

I

 

15.2

 

48

15.3

I ½

 

15.4

J

49

15.6

J ½

 

15.8

 

50

15.9

K

 

16

K ½

51

16.2

L

 

16.4

L ½

52

16.6

M

 

16.8

 

53

16.9

M ½

 

17

N

54

17.2

N ½

 

17.4

 

55

17.5

O

 

17.6

O ½

56

17.8

P

 

18

 

57

18.1

P ½

 

18.2

Q

 

18.4

 

58

18.5

Q ½

 

18.6

R

59

18.8

R ½

 

19

 

60

19.1

S

 

19.2

S ½

61

19.4

T

 

19.5

T ½

62

19.7

U

 

19.9

U ½

63

20.1

V

 

20.3

 

64

20.4

V ½

 

20.5

W

65

20.7

W ½

 

20.9

 

66

21

X

 

21.1

X ½

67

21.3

Y

 

21.5

 

68

21.6

Y ½

 

21.7

Z

 

21.9

 

69

22

Z ½

 

22.1

Z + 1

 

22.3