WEIGHT CHART

WEIGHT CHART OF GEMSTONE

WEIGHT CHART OF GEMSTONE (Approximate Weight in Carats)
Oval-"mm"
4*3
5*3
5*4
6*4
7*5
8*6
9*7
10*8
11*9
12*10
14*10
16*12
18*13
Amethyst/Citrine
0.15
0.21
0.33
0.45
0.76
1.10
1.60
2.40
3.20
4.10
6.20
11.00
14.00
Aquamarine
0.16
0.22
0.34
0.42
0.61
1.00
1.50
2.30
3.00
4.00
6.10
10.70
13.60
Emerald
0.17
0.25
0.35
0.47
0.75
1.10
1.65
2.40
3.50
4.50
7.50


Diamond
0.17
0.25
0.37
0.50
0.75
1.40
2.00
3.00
4.00
5.00
8.00


Garnet
0.22
0.27
0.40
0.55
1.00
1.40
2.10
2.80
3.70
5.00
7.10
12.00
15.20
Opal
0.10
0.16
0.22
0.28
0.47
0.78
1.10
1.60
2.10
3.00
4.00
5.20
6.75
Peridot
6.17
0.25
0.38
0.50
0.76
1.40
2.00
2.70
3.50
4.50
6.40
9.50
13.00
Ruby/Sapphire
0.24
0.31
0.50
0.60
1.00
1.60
2.20
3.40
4.60
5.40
7.20
12.00
17.50
Topaz
0.21
0.27
0.42
0.57
0.85
1.50
2.00
3.20
4.40
5.00
6.80
11.26
16.50
Tourmaline
0.15
0.25
0.37
0.50
0.75
1.20
2.30
2.90
3.50
4.70
6.30
11.10
14.00
Zircon
0.25
0.40
0.55
0.75
1.20
2.00
2.90
4.00
5.40
7.20
8.80
14.50
19.50
WEIGHT CHART OF GEMSTONE  (Approximate Weight in Carats)
Round-"mm"
2
2.5
3
3.5
4
5
6
7
8
9
10
Amethyst/Citrine
0.03
0.05
0.10
0.15
0.24
0.40
0.70
1.10
1.80
2.55
3.30
Aquamarine
0.03
0.05
0.08
0.15
0.22
0.40
0.42
1.20
2.00
2.75
3.50
Emerald
0.03
0.06
0.10
0.17
0.26
0.52
0.95
1.50
2.20
2.95
3.75
Diamond
0.04
0.07
0.10
0.17
0.23
0.50
0.90
1.40
1.90
3.05
4.25
Garnet
0.04
0.07
0.11
0.23
0.31
0.56
1.00
1.60
2.20
2.75
4.15
Opal
0.02
0.04
0.06
0.11
0.16
0.34
0.57
0.83
1.40
1.95
2.55
Peridot
0.03
0.05
0.11
0.15
0.30
0.53
0.85
1.20
2.00
2.39
4.38
Ruby/Sapphire
0.05
0.09
0.14
0.22
0.38
0.65
1.20
1.80
2.40
3.45
4.50
Topaz
0.04
0.09
0.11
0.20
0.34
0.56
1.00
1.50
2.00
3.30
4.40
Tourmaline
0.04
0.08
0.12
0.17
0.25
0.45
0.8
1.30
2.00
2.60
3.35
Zircon
0.06
0.10
0.16
0.26
0.40
0.69
1.40
2.00
2.80
3.60
4.80
WEIGHT CHART OF GEMSTONE  (Approximate Weight in Carats)
Octagon-"mm"
5x3
6*4
7*5
8*6
9*7
10*8
11*9
12*10
14*10
16*12
18*13
Amethyst/Citrine
0.27
0.55
0.95
1.50
2.30
3.00
4.20
5.60
7.60
10.50
17.00
Aquamarine
0.28
0.53
1.00
1.60
2.40
3.10
4.30
5.80
7.90
10.90
17.00
Emerald
0.32
0.60
1.00
1.75
2.50
3.30
4.50
5.80
8.00
11.00
17.00
Diamond
0.25
0.50
1.00
1.60
2.70
4.00
5.00
6.70
9.00
13.00
19.50
Garnet
0.34
0.68
1.10
1.70
2.70
3.70
4.80
6.40
8.50
15.50
21.00
Opal
0.27
0.55
0.95
1.50
2.30
3.00
4.20
5.60
7.60
10.50
17.00
Peridot
0.33
0.60
1.00
1.60
2.50
3.50
4.80
6.30
8.80
13.00
19.00
Ruby/Sapphire
0.45
0.75
1.20
1.75
2.90
4.00
6.00
7.30
9.90
16.50
22.00
Topaz
0.35
0.65
1.10
1.70
2.60
3.80
5.20
7.00
9.10
14.00
20.00
Tourmaline
0.30
0.60
1.00
1.60
2.50
3.50
4.60
6.20
8.70
13.00
18.50
Zircon
0.44
0.85
1.40
2.40
3.50
4.70
6.60
8.00
11.40
18.30
26.00
BIRTHSTONES
and what They Signify
MONTH
GEMSTONE
SIGNIFICANCE
January
Garnet
Constancy
February
Amethyst
Sincerity
March
Aquamarine
Wisdom
April
Diamond
Innocence
May
Emerald
Love
June
Alexandrite
Wealth
July
Ruby
Freedom
August
Peridot
Friendship
September
Sapphire
Truth
October
Tourmaline
Hope
November
Golden Topaz
Loyalty
December
Blue Zircon
Success
ANTWERP DIAMOND SIEVE SIZES
Plate Size
No of Stones per Carat
Weight
MM
Size
0
200
1/2pt
1.10-
1
11/2
2
21/2
3
175
150
125
110/115
100
1pt
1.15
1.20
1.25
1.30
1.35
31/2
4
41/2
5
51/2
90
80
70
60
50
2pt
1.40
1.45
1.50
1.55
1.60
6
61/2
7
71/2
48
45
35
33
3pt
1.70
1.80
1.90
2.00
8
81/2
30
25
4pt
2.10
2.20
9
91/2
22
20
5pt
2.30
2.40
10
101/2
11
18
17
16
6/7pt
2.50
2.60
2.70
111/2
12
15
13
7/8pt
2.80
2.90
121/2
11
9 pt
3.00
13
10
10pt
3.10
131/2
8/9
11 pt
3.20
14
8
12 pt
3.30
141/2
7.5
13 pt
3.40
15
6.5
15 pt
3.50
151/2
6
17 pt
3.60
16
5.5
18 pt
3.70
161/2
51/4
19 pt
3.80
17
43/4
21 pt
3.90
171/2
41/2
22 pt
4.00
18
41/2
23 pt
4.10
WEIGHT CHART OF GEMSTONE ( APPROXIMATE WEIGHT IN CARAT)
Pear-"mm"
5*3
6*4
7*5
8*5
9*6
10*7
12*8
15*10
Amethyst/Citrine
0.18
0.32
0.65
0.80
1.25
1.80
3.00
5.00
Aquamarine
0.21
0.33
0.67
0.90
1.30
1.85
2.95
5.60
Emerald
0.23
0.41
0.65
0.95
1.40
2.40
3.40
7.00
Diamond
0.22
0.40
0.75
0.95
1.40
2.00
3.20

Garnet
0.25
0.40
1.00
1.15
1.50
1.90
3.35
6.00
Opal
0.13
0.22
0.35
0.50
0.70
1.00
1.30
2.26
Peridot
0.25
0.40
0.70
0.90
1.10
1.40
3.20
5.75
Ruby/Sapphire
0.30
0.50
0.85
1.10
1.80
2.50
4.00
7.50
Topaz
0.29
0.45
0.95
1.00
1.70
2.40
3.50
6.60
Tourmaline
0.25
0.40
0.65
0.90
1.10
2.00
2.90
5.80
Zircon
0.32
0.60
1.00
1.30
2.60
3.50
4.50
8.45
Marquise-"mm"
4*2
5*2.5
6*3
7*3.5
8*4
10*5
12*6
Amethyst/Citrine
0.07
0.15
0.20
2.31
0.48
0.95
1.50
Aquamarine
0.09
0.13
0.21
0.33
0.50
1.00
1.60
Emerald
0.08
0.16
0.25
0.37
0.60
1.10
1.80
Diamond
0.12
0.18
0.25
0.34
0.50
1.00
1.75
Garnet
0.10
0.20
0.30
0.40
0.60
1.20
2.10
Opal
0.06
0.11
0.16
0.24
0.37
0.59
1.00
Peridot
0.09
0.15
0.24
0.34
0.50
0.95
2.00
Ruby/Sapphire
0.09
0.20
0.32
0.44
0.75
1.20
2.20
Topaz
0.10
0.19
0.28
0.42
0.68
1.10
2.00
Tourmaline
0.09
0.15
0.24
0.32
0.57
1.05
1.75
Zircon
0.13
0.25
0.37
0.53
0.75
1.40
2.35


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