Skip to content

All

Sort by

Sold out K18/Pt950 Brazilian Paraiba tourmaline 0.071ct diamond ring (K18YG, CuO: 1.9%, MnO: 2.2%)
Sold out 【12560359掲載】ジンバブエ産バイカラーユークレース 0.654ctルース
Sold out [Sakura In-Cut] Tanzanite from Tanzania 6.0mm/0.774ct Loose Stone
Sold out 【12560350掲載】ジンバブエ産ユークレース 0.138ctルース
Sold out Paraiba tourmaline from Brazil 0.066ct loose
Sold out マダガスカル産アンデシン・ラブラドライト(通称名 レインボームーンストーン) 0.570ctルース
Sold out マダガスカル産アンデシン・ラブラドライト(通称名 レインボームーンストーン) 0.666ctルース
Sold out ダイヤモンド 0.126ctルース(F, VS2)
Sold out ダイヤモンド 0.096ctルース(D, SI1)
Sold out アメリカ産レッドベリル 0.115ctルース
Sold out Cornflower Blue Sapphire 0.680ct Loose AIGS
Sold out マダガスカル産デマントイドガーネット 38.035ct原石
Sold out ブラジル産ティンカーベルクォーツ(ピンクファイヤークォーツ) 6.004ctルース
Sold out モンゴル産アンデシン 1.354ctルース
Sold out Sri Lankan Yellow Sapphire 0.526ct Loose
Sold out Brazilian bicolor tourmaline 1.016ct loose stone
Sold out 1.091ct loose Australian black opal
Sold out Australian black opal 0.435ct loose stone
Sold out Australian black opal 3.148ct loose
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 0.498ct Loose Stone
Sold out 0.321ct Blue Sapphire Loose Gemstone from Sri Lanka
Sold out Kenyan Tsavorite 0.157ct Loose Gemstone
Sold out Brazilian Indicolite Tourmaline 0.342ct Loose
Sold out Unheated Blue Sapphire from Madagascar, 1.380ct Loose, AIGS
Sold out Unheated Madagascar Purple Sapphire 1.170ct Loose GIT
Sold out Brazilian Dumortierite in Quartz 1.736ct Loose
Sold out Loose Brazilian Medusa Quartz (Paraiba Quartz) 0.748ct
Sold out Afghan Kunzite 5.6mm/0.897ct Loose
Sold out 18K Yellow Gold American Peridot 0.339ct Diamond Ring
Sold out Grandidierite from Madagascar 0.228ct loose stone
Sold out 南アフリカ産ダイヤモンド(メイカブル) 0.193ct原石
Sold out 【12546496掲載】ベトナム産非加熱シルキーピンクサファイア 0.161ctルース
Sold out パキスタン産オイルインクォーツ 0.361ctルース
Sold out パキスタン産オイルインクォーツ 0.325ctルース
Sold out [Koshu Precious Stones plusthree] Spanish Sphalerite 6.417ct Loose Stone
Sold out Colombian oil-free emerald 0.17ct loose GIA
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.438ct loose stone with certificate of authenticity
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.594ct loose stone with certificate of authenticity
Sold out Loose 0.901ct Imperial Topaz from Brazil with certificate
Sold out 0.915ct Loose Ludwigite in Peridot from Pakistan
Sold out Madagascar Bekily Blue Garnet (Color Change Garnet) 0.132ct Loose Stone
Sold out Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.150ct Loose
Sold out Russian Phenakite 0.615ct Loose Stone
Sold out Mexican fire opal 0.235ct loose (facet cut)
Sold out Tanzanian Mandarin Garnet Loose Stone 0.315ct

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.