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blue sapphire

Blue sapphire can be said to be the representative of blue gemstones.
Sapphires come in a wide variety of colors and come in many shades, but when they are simply referred to as "sapphires", they refer to blue sapphires.
It is a jewel that has been loved by the British royal family, including the engagement ring of the late Princess Diana.
The most valuable colors are cornflower blue and royal blue.
Sapphire is the birthstone for September.

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モンタナサファイア 0.275ctルース

Montana Sapphire 0.275ct Loose (Blue Sapphire) Sale price¥8,800
モンタナサファイア 0.217ctルース

Montana Sapphire 0.217ct Loose (Blue Sapphire) Sale price¥8,800
ブルーサファイア 0.326ctルース

Madagascar Blue Sapphire 4.0mm/0.326ct Loose Sale price¥11,000
スリランカ産非加熱サファイア 0.344ctルース

Sri Lankan Blue Sapphire 0.344ct Loose Sale price¥12,800
モンタナサファイア 0.272ctルース

Montana Sapphire 3.7mm/0.272ct Loose Stone (Blue Sapphire) Sale price¥9,800
モンタナサファイア 0.207ctルース

Montana Sapphire (Blue Sapphire) 0.207ct Loose Sale price¥6,980
ブルーサファイア 0.226ctルース

Sri Lankan Blue Sapphire 0.226ct Loose Sale price¥14,800
ブルーサファイア 5.616ctルース

Blue sapphire 5.616ct loose stone, Nihon-Dokukan, listed in the gemstone encyclopedia Sale price¥498,000
ブルーサファイア 0.231ctルース

Blue sapphire 0.231ct loose Sale price¥9,800
ブルーサファイア 0.287ctルース

Blue sapphire 0.287ct loose Sale price¥12,800
Sold out Limited to 19 stones: Blue sapphire from Madagascar (medium blue, oval cut) Discounts available for multiple purchases

Limited to 19 stones: Blue sapphire from Madagascar (medium blue, oval cut) Discounts available for multiple purchases
Sold out Win two unheated royal blue sapphires (with AIGS certificate) in the Blue Sapphire Lottery (Multiple purchase discounts available)

Win two unheated royal blue sapphires (with AIGS certificate) in the Blue Sapphire Lottery (Multiple purchase discounts available)
Sold out 《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》

《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》
Sold out Blue Sapphire Gacha Set Includes Two Unheated Royal Blue Sapphires (with AIGS Certificate) (Plus One Sapphire from the Teppanawa Mine) (Multiple Purchase Discounts Available)

Blue Sapphire Gacha Set Includes Two Unheated Royal Blue Sapphires (with AIGS Certificate) (Plus One Sapphire from the Teppanawa Mine) (Multiple Purchase Discounts Available)
Sold out ティールブルーサファイア 0.275ctルース

[Sale on May 12th at 10 PM] Teal Blue Sapphire 0.275 ct Loose Stone
Sold out 【22602565掲載】K18 ブルーサファイア リング

[On sale May 2nd at 10 PM] K18 Blue Sapphire Ring
Sold out スリランカ産ブルーサファイア 0.826ctルース

Sri Lankan Blue Sapphire 5.5mm/0.826ct Loose Stone
Sold out Loose 0.264ct Sri Lankan Blue Sapphire

Loose 0.264ct Sri Lankan Blue Sapphire
Sold out 【ゆきんこカット】合成サファイア 2.220ctルース（合成ブルーサファイア）

[Yukinko Cut] Synthetic Sapphire 2.220ct Loose (Synthetic Blue Sapphire)
Sold out Montana sapphire 0.359ct loose (blue sapphire)

Montana sapphire 0.359ct loose (blue sapphire)
Sold out Cornflower Blue Sapphire 0.370ct Loose AIGS

Cornflower Blue Sapphire 0.370ct Loose AIGS
Sold out Unheated Blue Sapphire from Madagascar, 1.380ct Loose, AIGS

Unheated Blue Sapphire from Madagascar, 1.380ct Loose, AIGS

Sold out 0.321ct Blue Sapphire Loose Gemstone from Sri Lanka

0.321ct Blue Sapphire Loose Gemstone from Sri Lanka
Sold out Cornflower Blue Sapphire 0.680ct Loose AIGS

Cornflower Blue Sapphire 0.680ct Loose AIGS
Sold out Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS

Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS
Sold out Royal Blue Sapphire 1.00ct Loose AIGS

Royal Blue Sapphire 1.00ct Loose AIGS

Sold out Sri Lankan blue sapphire 0.645ct loose stone

Sri Lankan blue sapphire 0.645ct loose stone
Sold out 2.393ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)

2.393ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sold out 2.077ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)

2.077ct Synthetic Sapphire Loose Stone (Synthetic Blue Sapphire)
Sold out スリランカ産ブルーサファイア（アイスブルー） 0.300ctルース

Sri Lankan Blue Sapphire (Ice Blue) 0.300ct Loose
Sold out ブルーサファイア 1.095ctルース

1.095ct loose blue sapphire
Sold out K18YG コーンフラワーブルーサファイア 4.5mm/0.41ct・アウイナイト・パライバトルマリン リング

18K Yellow Gold Cornflower Blue Sapphire 4.5mm/0.41ct, Apatite, and Paraiba Tourmaline Ring

Sold out スリランカ産ブルーサファイア 0.555ctルース

Sri Lankan blue sapphire 0.555ct loose stone
Sold out "Purple Sun Night" Ice Blue Sapphire, Amethyst, Bekiri Blue Garnet, and Tanzanite 13-Stone Half Eternity Ring Set (2.0mm)

"Purple Sun Night" Ice Blue Sapphire, Amethyst, Bekiri Blue Garnet, and Tanzanite 13-Stone Half Eternity Ring Set (2.0mm)

Sold out 非加熱ロイヤルブルーサファイア 0.640ctルース AIGS

Unheated Royal Blue Sapphire 0.640ct Loose AIGS

Sold out マダガスカル産ブルーサファイア 0.338ctルース

0.338ct loose blue sapphire from Madagascar
Sold out ロイヤルブルーサファイア 1.44ctルース GIA

Royal blue sapphire 1.44ct loose GIA

Sold out 非加熱ブルーサファイア 1.685ctルース

[Published in 12539647] Unheated blue sapphire 1.685ct loose

Sold out 非加熱ブルーサファイア 0.862ctルース

[12549429] Blue sapphire 0.862ct loose stone
Sold out ブルーサファイア 0.244ctルース

0.244ct loose blue sapphire from Madagascar

Sold out ブルーサファイア 0.591ctルース

Blue sapphire 0.591ct loose stone
Sold out ブルーサファイア 0.843ctルース

0.843ct loose blue sapphire from Madagascar
Sold out ブルーサファイア 1.141ctルース

1.141ct loose blue sapphire from Madagascar

Sold out マダガスカル産ブルーサファイア 4.7mm/0.522ctルース

Madagascar Blue Sapphire 4.7mm/0.522ct Loose
Sold out ブルーサファイア 0.162ctルース

0.162ct loose blue sapphire from Madagascar
Sold out サファイア 0.890ctルース

Unheated Sri Lankan blue sapphire 0.890ct loose
Sold out コーンフラワーブルーサファイア 0.530ctルース AIGS

Cornflower Blue Sapphire 0.530ct Loose AIGS

KARATZ Custom Made

Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.

KARATZ・Five Commitments

So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.

KARATZ's Initiatives and Social Contributions

We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.

KARATZ Books

These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.

jeweler's tools

For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.