
Natural IGI-GTL certified Blue Sapphire Gemstone ( Non heated-Untreated)
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Size Guide
United States | Canada | Mexico | United Kingdom | Ireland | Australia | South Africa | New Zealand | China | Japan | South Korea | South America | India | Italy | Spain | Switzerland |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 0 | |||||||||||||
¼ | ¼ | ¼ | |||||||||||||
½ | ½ | ½ | A | A | A | A | A | ||||||||
¾ | ¾ | ¾ | A ½ | A ½ | A ½ | A ½ | A ½ | ||||||||
1 | 1 | 1 | B | B | B | B | B | 1 | 1 | 1 | 1 | ||||
1 ¼ | 1 ¼ | 1 ¼ | B ½ | B ½ | B ½ | B ½ | B ½ | ||||||||
1 ½ | 1 ½ | 1 ½ | C | C | C | C | C | 0.4 | 0.4 | 0.4 | |||||
1 ¾ | 1 ¾ | 1 ¾ | C ½ | C ½ | C ½ | C ½ | C ½ | 1 | 1 | 1 | 1 | ||||
2 | 2 | 2 | D | D | D | D | D | 2 | 2 | 2 | 2 | 2 | 1.7 | 1.7 | 1.7 |
2 ¼ | 2 ¼ | 2 ¼ | D ½ | D ½ | D ½ | D ½ | D ½ | 2.3 | 2.3 | 2.3 | |||||
2 ½ | 2 ½ | 2 ½ | E | E | E | E | E | 3 | 3 | 3 | 3 | 3 | 2.9 | 2.9 | 2.9 |
2 ¾ | 2 ¾ | 2 ¾ | E ½ | E ½ | E ½ | E ½ | E ½ | 4 | 3.6 | 3.6 | 3.6 | ||||
3 | 3 | 3 | F | F | F | F | F | 4 | 4 | 4 | 4 | 4.2 | 4.2 | 4.2 | |
3 ¼ | 3 ¼ | 3 ¼ | F ½ | F ½ | F ½ | F ½ | F ½ | 5 | 5 | 5 | 5 | 5 | 4.8 | 4.8 | 4.8 |
3 ½ | 3 ½ | 3 ½ | G | G | G | G | G | 5.5 | 5.5 | 5.5 | |||||
3 ¾ | 3 ¾ | 3 ¾ | G ½ | G ½ | G ½ | G ½ | G ½ | 6 | 6 | 6 | 6 | 6 | 6.1 | 6.1 | 6.1 |
4 | 4 | 4 | H | H | H | H | H | 7 | 7 | 7 | 7 | 6.8 | 6.8 | 6.8 | |
4 ¼ | 4 ¼ | 4 ¼ | H ½ | H ½ | H ½ | H ½ | H ½ | 7 | 7.4 | 7.4 | 7.4 | ||||
4 ½ | 4 ½ | 4 ½ | I | I | I | I | I | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
4 ¾ | 4 ¾ | 4 ¾ | J | J | J | J | J | 9 | 8.7 | 8.7 | 8.7 | ||||
5 | 5 | 5 | J ½ | J ½ | J ½ | J ½ | J ½ | 9 | 9 | 9 | 9 | 9.3 | 9.3 | 9.3 | |
5 ¼ | 5 ¼ | 5 ¼ | K | K | K | K | K | 10 | 10 | 10 | 10 | ||||
5 ½ | 5 ½ | 5 ½ | K ½ | K ½ | K ½ | K ½ | K ½ | 10 | 10 | 10 | 10 | 10.6 | 10.6 | 10.6 | |
5 ¾ | 5 ¾ | 5 ¾ | L | L | L | L | L | 11 | 11.2 | 11.2 | 11.2 | ||||
6 | 6 | 6 | L ½ | L ½ | L ½ | L ½ | L ½ | 11 | 11 | 11 | 11 | 12 | 11.9 | 11.9 | 11.9 |
6 ¼ | 6 ¼ | 6 ¼ | M | M | M | M | M | 12 | 12 | 12 | 12 | 12.5 | 12.5 | 12.5 | |
6 ½ | 6 ½ | 6 ½ | M ½ | M ½ | M ½ | M ½ | M ½ | 13 | 13 | 13 | 13 | 13 | 13.1 | 13.1 | 13.1 |
6 ¾ | 6 ¾ | 6 ¾ | N | N | N | N | N | 13.8 | 13.8 | 13.8 | |||||
7 | 7 | 7 | N ½ | N ½ | N ½ | N ½ | N ½ | 14 | 14 | 14 | 14 | 14 | 14.4 | 14.4 | 14.4 |
7 ¼ | 7 ¼ | 7 ¼ | O | O | O | O | O | 15 | 15.1 | 15.1 | 15.1 | ||||
7 ½ | 7 ½ | 7 ½ | O ½ | O ½ | O ½ | O ½ | O ½ | 15 | 15 | 15 | 15 | 15.7 | 15.7 | 15.7 | |
7 ¾ | 7 ¾ | 7 ¾ | P | P | P | P | P | 16 | 16.3 | 16.3 | 16.3 | ||||
8 | 8 | 8 | P ½ | P ½ | P ½ | P ½ | P ½ | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 |
8 ¼ | 8 ¼ | 8 ¼ | Q | Q | Q | Q | Q | 17.6 | 17.6 | 17.6 | |||||
8 ½ | 8 ½ | 8 ½ | Q ½ | Q ½ | Q ½ | Q ½ | Q ½ | 17 | 17 | 17 | 17 | 18 | 18.3 | 18.3 | 18.3 |
8 ¾ | 8 ¾ | 8 ¾ | R | R | R | R | R | 19 | 18.9 | 18.9 | 18.9 | ||||
9 | 9 | 9 | R ½ | R ½ | R ½ | R ½ | R ½ | 18 | 18 | 18 | 18 | 19.5 | 19.5 | 19.5 | |
9 ¼ | 9 ¼ | 9 ¼ | S | S | S | S | S | 20 | 20.2 | 20.2 | 20.2 | ||||
9 ½ | 9 ½ | 9 ½ | S ½ | S ½ | S ½ | S ½ | S ½ | 19 | 19 | 19 | 19 | 21 | 20.8 | 20.8 | 20.8 |
9 ¾ | 9 ¾ | 9 ¾ | T | T | T | T | T | 21.4 | 21.4 | 21.4 | |||||
10 | 10 | 10 | T ½ | T ½ | T ½ | T ½ | T ½ | 20 | 20 | 20 | 20 | 22 | 22.1 | 22.1 | 22.1 |
10 ¼ | 10 ¼ | 10 ¼ | U | U | U | U | U | 21 | 21 | 21 | 21 | 23 | 22.7 | 22.7 | 22.7 |
10 ½ | 10 ½ | 10 ½ | U ½ | U ½ | U ½ | U ½ | U ½ | 22 | 22 | 22 | 22 | 23.4 | 23.4 | 23.4 | |
10 ¾ | 10 ¾ | 10 ¾ | V | V | V | V | V | 24 | 24 | 24 | 24 | ||||
11 | 11 | 11 | V ½ | V ½ | V ½ | V ½ | V ½ | 23 | 23 | 23 | 23 | 25 | 24.6 | 24.6 | 24.6 |
11 ¼ | 11 ¼ | 11 ¼ | W | W | W | W | W | 25.3 | 25.3 | 25.3 | |||||
11 ½ | 11 ½ | 11 ½ | W ½ | W ½ | W ½ | W ½ | W ½ | 24 | 24 | 24 | 24 | 26 | 25.9 | 25.9 | 25.9 |
11 ¾ | 11 ¾ | 11 ¾ | X | X | X | X | X | 26.6 | 26.6 | 26.6 | |||||
12 | 12 | 12 | X ½ | X ½ | X ½ | X ½ | X ½ | 25 | 25 | 25 | 25 | 27 | 27.2 | 27.2 | 27.2 |
12 ¼ | 12 ¼ | 12 ¼ | Y | Y | Y | Y | Y | 28 | 27.8 | 27.8 | 27.8 | ||||
12 ½ | 12 ½ | 12 ½ | Z | Z | Z | Z | Z | 26 | 26 | 26 | 26 | 28.5 | 28.5 | 28.5 | |
12 ¾ | 12 ¾ | 12 ¾ | Z ½ | Z ½ | Z ½ | Z ½ | Z ½ | 29 | 29.1 | 29.1 | 29.1 | ||||
13 | 13 | 13 | 27 | 27 | 27 | 27 | 30 | 29.7 | 29.7 | 29.7 | |||||
13 ¼ | 13 ¼ | 13 ¼ | Z1 | Z1 | Z1 | Z1 | Z1 | 30.4 | 30.4 | 30.4 | |||||
13 ½ | 13 ½ | 13 ½ | 31 | 31 | 31 | 31 | |||||||||
13 ¾ | 13 ¾ | 13 ¾ | Z2 | Z2 | Z2 | Z2 | Z2 | 32 | 31.7 | 31.7 | 31.7 | ||||
14 | 14 | 14 | Z3 | Z3 | Z3 | Z3 | Z3 | 32.3 | 32.3 | 32.3 | |||||
14 ¼ | 14 ¼ | 14 ¼ | 33 | 32.9 | 32.9 | 32.9 | |||||||||
14 ½ | 14 ½ | 14 ½ | Z4 | Z4 | Z4 | Z4 | Z4 | 33.4 | 33.4 | 33.4 | |||||
14 ¾ | 14 ¾ | 14 ¾ | 34 | 34.2 | 34.2 | 34.2 | |||||||||
15 | 15 | 15 | 35 | 34.8 | 34.8 | 34.8 | |||||||||
15 ¼ | 15 ¼ | 15 ¼ | 35.5 | 35.5 | 35.5 | ||||||||||
15 ½ | 15 ½ | 15 ½ | 36 | 36.1 | 36.1 | 36.1 | |||||||||
15 ¾ | 15 ¾ | 15 ¾ | 36.8 | 36.8 | 36.8 |
Blue sapphire is a stunning gemstone known for its vibrant blue color, durability, and luxury appeal. Some key characteristics include:
- Color: Rich blue, ranging from pale to deep cornflower blue
- Hardness: 9 on the Mohs scale, making it highly durable
- Sources: Found in countries like Sri Lanka, Myanmar, and Madagascar
- Symbolism: Believed to represent loyalty, wisdom, and nobility
Blue sapphires are popular for jewelry, especially engagement rings, and are said to bring good fortune and protection. Their beauty and durability make them a timeless choice.