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Sold out Montana sapphire 0.359ct loose (blue sapphire)

Montana sapphire 0.359ct loose (blue sapphire)
Sold out Montana Sapphire 0.449ct loose (bicolor sapphire)

Montana Sapphire 0.449ct loose (bicolor sapphire)
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.960ctルース

Rainbow garnet (andradite garnet) from Tenkawa Village, Nara Prefecture 0.960ct loose
Sold out Indian alexandrite cat's eye 0.422ct loose

Indian alexandrite cat's eye 0.422ct loose
Sold out ブラジル産デュモルチェライトインクォーツ 0.876ctルース

[On sale May 30th, 10 PM JST] Brazilian Dumortierite in Quartz 0.876ct Loose Gemstone (Faceted Cut)
Sold out Kenyan Tsavorite 0.164ct Loose Stone

Kenyan Tsavorite 0.164ct Loose Stone
Sold out 【12561526掲載】タンザニア産ピンクジルコン 1.736ctルース

Tanzanian pink zircon 1.736ct loose stone
Sold out カンボジア産ブルージルコン（ラタナキリブルー） 0.519ctルース

Cambodian Blue Zircon (Ratanakiri Blue) 0.519 ct Loose Gemstone
Sold out Lazulite (0.077ct) from Pakistan, loose

Lazulite (0.077ct) from Pakistan, 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

USA origin Oregon Sunstone 0.472ct Loose
Sold out 【12559896掲載】ブラジル産エレスチャルアメジスト 3.678ctルース

Brazilian Elestial Amethyst 3.678ct Loose Stone
Sold out 奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 1.951ctルース

Rainbow Garnet (Andradite Garnet) 1.951ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out Myanmar color change zircon 0.439ct loose stone

Myanmar color change zircon 0.439ct loose stone
Sold out Sri Lankan Cobalt Spinel (Blue Spinel) 3.202ct Loose Stone (Needle-like Inclusions) Japan-German Rare Stone

Sri Lankan Cobalt Spinel (Blue Spinel) 3.202ct Loose Stone (Needle-like Inclusions) Japan-German Rare Stone

Sold out Pakistani Triplite 1.107ct Loose Stone

Pakistani Triplite 1.107ct Loose Stone
Sold out Mexican Fire Opal 0.281ct Loose

Mexican Fire Opal 0.281ct Loose
Sold out 【12547478掲載】ヴァイオレットスピネル 0.776ctルース

Myanmar Violet Spinel 0.776ct Loose

Sold out Brazilian Yellow Beryl 1.473 ct Loose Stone

Brazilian Yellow Beryl 1.473 ct Loose Stone
Sold out 0.243ct Colombian Emerald Pair Loose Stones

0.243ct Colombian Emerald Pair Loose Stones
Sold out Kenyan Tsavorite 0.347ct Loose Stone

Kenyan Tsavorite 0.347ct Loose Stone
Sold out 0.278 ct loose Nigerian cobalt gahnite with Japanese and German appraisals

0.278 ct loose Nigerian cobalt gahnite with Japanese and German appraisals
Sold out Anthill garnet from the USA (with forsterite) 0.578ct loose

Anthill garnet from the USA (with forsterite) 0.578ct loose

Sold out USA Oregon Sunstone 2.160ct Loose

USA Oregon Sunstone 2.160ct Loose
Sold out USA Oregon Sunstone 1.869ct Loose

USA Oregon Sunstone 1.869ct Loose
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.537ct Loose

Cambodian Blue Zircon (Ratanakiri Blue) 0.537ct Loose
Sold out 0.218ct Unheated Silky Pink Sapphire from Vietnam

0.218ct Unheated Silky Pink Sapphire from Vietnam
Sold out 0.168ct Unheated Silky Pink Sapphire from Vietnam

0.168ct Unheated Silky Pink Sapphire from Vietnam
Sold out Mexican fire opal 0.235ct loose (facet cut)

Mexican fire opal 0.235ct loose (facet cut)
Sold out Madagascar Bekily Blue Garnet (Color Change Garnet) 0.132ct Loose Stone

Madagascar Bekily Blue Garnet (Color Change Garnet) 0.132ct Loose Stone
Sold out Loose 0.901ct Imperial Topaz from Brazil with certificate

Loose 0.901ct Imperial Topaz from Brazil with certificate

Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.594ct loose stone with certificate of authenticity

Brazilian unheated pink imperial topaz (sherry pink) 0.594ct loose stone with certificate of authenticity
Sold out Grandidierite from Madagascar 0.228ct loose stone

Grandidierite from Madagascar 0.228ct loose stone
Sold out Unheated Madagascar Purple Sapphire 1.170ct Loose GIT

Unheated Madagascar Purple Sapphire 1.170ct Loose GIT

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

Unheated Blue Sapphire from Madagascar, 1.380ct Loose, AIGS

Sold out Brazilian Indicolite Tourmaline 0.342ct Loose

Brazilian Indicolite Tourmaline 0.342ct Loose

Sold out Kenyan Tsavorite 0.157ct Loose Gemstone

Kenyan Tsavorite 0.157ct Loose Gemstone
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 【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

Zimbabwean Bicolor Euclase 0.654ct Loose Stone
Sold out Tanzanian Dragon Garnet 1.181ct Loose Stone

Tanzanian Dragon Garnet 1.181ct Loose Stone
Sold out Brazilian Paraiba tourmaline 0.128ct loose stone (CuO: 1.7%, MnO: 3.4%)

Brazilian Paraiba tourmaline 0.128ct loose stone (CuO: 1.7%, MnO: 3.4%)

Sold out German Auchenite 0.083ct loose stone

German Auchenite 0.083ct loose stone
Sold out Madagascar Iolite 0.644ct Loose Stone

Madagascar Iolite 0.644ct Loose Stone
Sold out [12/9 22:00 Sale] Sinhalite from Sri Lanka 0.658ct Loose Stone

[12/9 22:00 Sale] Sinhalite from Sri Lanka 0.658ct Loose Stone

Sold out [12/10 22:00] Mali Garnet (Grossular/Andradite Garnet) 1.008ct Loose Stone from the Republic of Mali with Certificate of Authenticity

[12/10 22:00] Mali Garnet (Grossular/Andradite Garnet) 1.008ct Loose Stone from the Republic of Mali with Certificate of Authenticity
Sold out Mali Garnet (Grossular/Andradite Garnet) 0.811ct Loose Stone from the Republic of Mali with Certificate of Authenticity

Mali Garnet (Grossular/Andradite Garnet) 0.811ct Loose Stone from the Republic of Mali with Certificate of Authenticity

Sold out Spinel 0.310ct loose

Spinel 0.310ct 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.

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.