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0.3ct - 0.5ct

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Sold out American Neptunite 0.207ct Loose Stone with Certificate of Authenticity
Sold out 【12562061掲載】アメリカ産ネプチュナイト 0.256ctルース
Sold out American Neptunite 0.290ct Loose Stone with Certificate of Authenticity
Sold out 【12562049掲載】オーストラリア産レインボーラティスサンストーン 0.373ctルース
Sold out 【12562017掲載】ブラジル産ヘルデライト 0.421ctルース
Sold out 【12558711掲載】ドゥニライト 0.132ctルース
Sold out Brazilian Dumortierite in Quartz 0.463ct Loose Stone (Faceted Cut)
Sold out 【12561951掲載】アメリカ産アントヒルガーネット 0.370ctルース
Sold out 【12561896掲載】ロンドンブルートパーズ 0.476ctルース
Sold out Madagascar Grandidierite 0.109ct loose stone
Sold out マダガスカル産グランディディエライト 0.108ctルース
Sold out Kenyan Tsavorite 0.164ct Loose Stone
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.354ct Loose Stone
Sold out Synthetic rutile 3.9mm/0.329ct loose stone
Sold out Brazilian Rainbow Scapolite 0.435ct Loose Stone
Sold out 【12561168掲載】メキシコ産ウォーターオパール(ファセットカット) 0.349ctルース
Sold out 【12561129掲載】スリランカ産イエローサファイア 0.291ctルース
Sold out ピンクサファリン 0.178ctルース
Sold out パキスタン産ヴィータニエミアイト 0.184ctルース
Sold out 【12561913掲載】オーストラリア産ブラックオパール 0.221ctルース
Sold out Brazilian Alexandrite 3.0mm/0.121ct Loose
Sold out 【12561305掲載】アメリカ産オレゴンサンストーン 0.472ctルース
Sold out Sri Lankan green zircon 0.494ct loose stone
Sold out Myanmar Red Spinel 0.196ct Loose Stone
Sold out Tanzanite from Tanzania 0.331ct loose stone
Sold out Myanmar color change zircon 0.439ct loose stone
Sold out Pink sapphire (with hematite) 0.271ct loose stone
Sold out Diamond rough (makeable) 0.353ct rough
Sold out Diamond rough (makeable) 0.279ct rough
Sold out Sri Lankan Forsterite 0.231ct Loose Stone, Japan-German
Sold out Mexican Fire Opal 0.281ct Loose
Sold out Tanzanite from Tanzania 4.5mm/0.390ct Loose Stone AIGS
Sold out Cornflower Blue Sapphire 0.370ct Loose AIGS
Sold out 0.336 ct Tanzanian Kornerupine Loose Gemstone
Sold out Ruby 3.3mm/0.171ct Loose
Sold out 0.243ct Colombian Emerald Pair Loose Stones
Sold out 0.316 ct Tanzanian Bicolor Grossular Garnet Loose Stone
Sold out U.S. Red Beryl 3.2mm/0.111ct Loose Stone
Sold out USA Oregon Sunstone 5.0mm/0.443ct Loose
Sold out Grandidierite from Madagascar 0.269ct loose stone
Sold out Brazilian Imperial Topaz, 0.353 ct loose stone
Sold out Burmese Ice Jadeite, 0.408ct loose stone
Sold out Kenyan Tsavorite 0.347ct Loose Stone
Sold out Pigeon blood ruby ​​0.310ct loose
Sold out Pigeon's Blood Ruby 4.0mm/0.230ct Loose AIGS
Sold out Tanzanite from Tanzania 0.417ct Loose Gemstone
Sold out パパラチアサファイア 0.191ctルース
Sold out 0.278 ct loose Nigerian cobalt gahnite with Japanese and German appraisals

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.