Based on the philosophy of environmental protection, we have developed a highly durable stone with better optical properties than diamond. The stones we use are laboratory- grown SONA diamonds (the finest cubic zirconia) , with nearly the same brilliance and hardness as real diamonds, making them the best alternatives to natural gemstones.

It has a high refractive index, and the degree of dispersion (fire) of light is about 2.5 times that of diamond (0.044). In addition, the Mohs hardness is almost the same as diamond, and the price is also very attractive.

Sona diamonds are recommended for those who like fresh and moist brilliance, and those who want to enjoy them at an affordable price.

Why choose sona diamond?

SonaDiamond natural diamond
look like a diamond
Durability
Mohs hardness (hardness) 9.2 Ten
density 5.50 3.52
refractive index of light Around 2.2 around 2.4
100% logically sourced /
Potential Harmful Mining /
price difference ¥5000 ~ around 20000 ¥10,000 ~ Over 500,000

What color are your gems?

My favorite gem that I got because I fell in love with the color. Jewelry that has no use even though it was handed down. When you try to make jewelry that is perfect for you, you may be wondering what kind of design is good. What design will match the color of your gemstone? Please refer to the story of jewelry and find your favorite color.

*The use of natural moissanite is prohibited because it is extremely rare to be produced on earth. Therefore, scientists tried to manufacture this beautiful material, and finally succeeded in developing moissanite that can be used as jewelry, and moissanite began to be distributed on the market around 1998. Moissanite's chemical composition is Silicon Carbide (SiC), which has excellent properties of hardness and durability similar to diamond.Moissanite's most amazing property is its dazzling brilliance. It boasts 2.5 times the value of diamond. Moissanite is not a diamond imitation stone but also an excellent gemstone.

comparison diamond Moissanite
refractive index 2.42 2.69
Dispersion (Fire) 0.044 0.104
Glossiness 17.20% 20.40%
Mohs hardness Ten 9.25
toughness Good Excellent
heat resistance expensive very high
price ¥ 330,000-880,000 yen/ct ¥ 20,000-50,000 yen/ct