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.

Sold out

Blue sapphire (ice blue) 0.550ct loose stone

Sold out

Teal blue sapphire 0.259ct loose stone

Sold out

K18マダガスカル産ロイヤルブルーサファイア0.57ct・ダイヤモンドリング GIA

K18 Royal Blue Sapphire from Madagascar 0.57ct Diamond Ring GIA

Sold out

Blue sapphire 0.547ct loose

Sold out

Montana Sapphire 0.286ct Loose (Teal Blue Sapphire)

Sold out

Montana Sapphire 0.302ct loose (blue sapphire)

Sold out

[Mr. Sanjay] Blue sapphire 1.239ct loose

Sold out

[Dandelion Cut] K18PG Blue Sapphire 1.469ct Ring Japanese-German Edition

Sold out

Pt900 Madagascar Royal Blue Sapphire 0.53ct Ring GIA

Sold out

Cornflower blue sapphire 0.860ct loose AIGS

Sold out

Unheated royal blue sapphire 0.560ct loose AIGS

Sold out

Blue sapphire 4.3mm/0.300ct loose

Sold out

Blue sapphire 4.3mm/0.335ct loose

Sold out

Blue sapphire 4.6mm/0.553ct loose

Sold out

Blue sapphire 4.7mm/0.478ct loose

Sold out

Blue sapphire 5.4mm/0.687ct loose

Sold out

Cornflower blue sapphire 2.040ct loose AIGS

Sold out

Ice blue sapphire from Madagascar 4.3mm/0.408ct loose

Sold out

Haruka Nanase model (blue sapphire)《Platinum material》

Sold out

Royal blue sapphire 0.482ct loose DGL version

Sold out

Unheated royal blue sapphire 0.960ct loose AIGS

Sold out

Montana Sapphire 3.0mm/0.116ct Loose (Blue Sapphire)

Sold out

Unheated royal blue sapphire 0.960ct loose AIGS

Sold out

Unheated cornflower blue sapphire 1.01ct loose AIGS

Sold out

Blue sapphire 4mm/0.340ct loose

Sold out

Cornflower blue sapphire from Sri Lanka 3.156ct loose AIGS

Sold out

Blue sapphire 0.343ct loose

Sold out

Blue sapphire 0.364ct loose

Sold out

Cornflower blue sapphire 0.70ct loose AIGS

Sold out

Unheated blue sapphire 6.886ct loose

Sold out

Unheated blue sapphire 6.181ct loose

Sold out

Royal blue sapphire 1.02ct loose AIGS

Sold out

Cornflower blue sapphire 0.470ct loose AIGS

Sold out

Royal blue sapphire 0.700ct loose AIGS

Sold out

Royal blue sapphire 3.070ct loose AIGS

Sold out

Royal blue sapphire 2.040ct loose AIGS

Sold out

Royal blue sapphire 1.770ct loose AIGS

Sold out

Royal blue sapphire 1.010ct loose AIGS

Sold out

Blue sapphire 0.963ct loose Japanese-German book

Sold out

Blue sapphire 0.851ct loose Japanese-German book

Sold out

Blue sapphire 4.015ct loose (star cut)

Sold out

Royal blue sapphire 3.070ct loose AIGS

Sold out

blue sapphire 4mm loose

Sold out

blue sapphire 4mm loose

Sold out

Blue sapphire 4mm/0.311ct loose

Sold out

Blue sapphire 4mm/0.302ct loose

Sold out

blue sapphire 3.5mm loose

Sold out

Blue sapphire 3.5mm loose

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.

KARATZ・Five Commitments