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Sold out 0.316 ct Tanzanian Bicolor Grossular Garnet Loose Stone

0.316 ct Tanzanian Bicolor Grossular Garnet Loose Stone
Sold out 0.243ct Colombian Emerald Pair Loose Stones

0.243ct Colombian Emerald Pair Loose Stones
Sold out Afghan Kunzite 0.606ct Loose Stone

Afghan Kunzite 0.606ct Loose Stone
Sold out Ruby 3.3mm/0.171ct Loose

Ruby 3.3mm/0.171ct Loose
Sold out 0.099ct Loose Grandidierite from Madagascar

0.099ct Loose Grandidierite from Madagascar
Sold out 0.336 ct Tanzanian Kornerupine Loose Gemstone

0.336 ct Tanzanian Kornerupine Loose Gemstone
Sold out Sweet Home Mine Rhodochrosite 0.677ct Loose Gemstone

Sweet Home Mine Rhodochrosite 0.677ct Loose Gemstone
Sold out Brazilian Yellow Beryl 1.473 ct Loose Stone

Brazilian Yellow Beryl 1.473 ct Loose Stone
Sold out Cornflower Blue Sapphire 0.370ct Loose AIGS

Cornflower Blue Sapphire 0.370ct Loose AIGS
Sold out Tanzanite from Tanzania 4.5mm/0.390ct Loose Stone AIGS

Tanzanite from Tanzania 4.5mm/0.390ct Loose Stone AIGS
Sold out Pt950 Bicolor Sapphire Pendant Top (Necklace Top)

Pt950 Bicolor Sapphire Pendant Top (Necklace Top)

Sold out Pink Diamond 0.139ct Loose (FANCY PURPLISH PINK, I1)

Pink Diamond 0.139ct Loose (FANCY PURPLISH PINK, I1)
Sold out Pink tourmaline 0.341ct loose

Pink tourmaline 0.341ct loose

Sold out タンザニア産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 0.928ctルース

Tanzanian Andesine Labradorite (also known as Rainbow Moonstone) 0.928ct loose stone
Sold out タンザニア産アンデシン・ラブラドライト（通称名 レインボームーンストーン） 1.026ctルース

Tanzanian Andesine Labradorite (also known as Rainbow Moonstone) 1.026ct loose stone
Sold out Andalusite 0.487ct loose

Andalusite 0.487ct loose
Sold out 【さくらインカット】ラベンダークォーツ（スコロライト） 2.161ctルース

[Sakura in-cut] Lavender quartz (scorolite) 8mm/ 2.161ct loose
Sold out Pakistani oil-in quartz 0.595ct loose

Pakistani oil-in quartz 0.595ct loose
Sold out カンボジア産ブルージルコン（ラタナキリブルー） 0.615ctルース

Cambodian blue zircon (Ratanakiri blue) 0.615ct loose

Sold out スリランカ産エンスタタイト 2.095ctルース

Enstatite from Sri Lanka 2.095ct loose Japanese-German edition

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 Mexican Fire Opal 0.281ct Loose

Mexican Fire Opal 0.281ct Loose
Sold out Synthetic Alexandrite 2.046ct Loose

Synthetic Alexandrite 2.046ct Loose
Sold out Russian Alexandrite 2.4mm/0.061ct Loose Stone

Russian Alexandrite 2.4mm/0.061ct Loose Stone
Sold out 0.072 ct loose Bekily blue garnet (color-change garnet) from Madagascar

0.072 ct loose Bekily blue garnet (color-change garnet) from Madagascar
Sold out Sri Lankan Moonstone 1.487ct Loose

Sri Lankan Moonstone 1.487ct Loose
Sold out Sri Lankan moonstone 7.2mm/1.342ct loose gemstone

Sri Lankan moonstone 7.2mm/1.342ct loose gemstone
Sold out Colombian emerald rough stone 18.900ct (with pyrite)

Colombian emerald rough stone 18.900ct (with pyrite)
Sold out 【12552511掲載】ピンクダイヤモンド 0.296ctルース

Pink Diamond 0.296ct Loose (Cabochon Cut) Certificate of Authenticity
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） 0.639ctルース

Rainbow garnet (andradite garnet) 0.639ct loose from Tenkawa Village, Nara Prefecture
Sold out 【22602044掲載】SV925 シーブルーカルセドニー ペンダントトップ（ネックレストップ）

SV925 Sea Blue Chalcedony x Onyx Pendant Top (Necklace Top) by Makoto Nakano
Sold out Russian alexandrite normally 69,800 JPY, rare twin chrysoberyl cat's eye normally 65,800 JPY, Alex Gacha (multiple purchase discount available)

Russian alexandrite normally 69,800 JPY, rare twin chrysoberyl cat's eye normally 65,800 JPY, Alex Gacha (multiple purchase discount available)
Sold out Brazilian Paraiba Tourmaline (CuO: 2.3% and CuO: 1.4%) & Kornerupine Rough Gacha 《Multiple Purchase Discount Available》

Brazilian Paraiba Tourmaline (CuO: 2.3% and CuO: 1.4%) & Kornerupine Rough Gacha 《Multiple Purchase Discount Available》
Sold out 《Limited to 13 stones》Normally ¥49,800 Koshu Kiseki Kiriko plusthree "Subaru" lottery💎 Andesine Gacha《Multiple Purchase Discount Available》

《Limited to 13 stones》Normally ¥49,800 Koshu Kiseki Kiriko plusthree "Subaru" lottery💎 Andesine Gacha《Multiple Purchase Discount Available》
Sold out Rare Stone Gacha 💎 Mozambique Paraiba Tourmaline, normally priced at ¥29,800, 1.8ct with a Shanshan appraisal certificate, Kornerupine, Epidote (Multiple purchase discount available)

Rare Stone Gacha 💎 Mozambique Paraiba Tourmaline, normally priced at ¥29,800, 1.8ct with a Shanshan appraisal certificate, Kornerupine, Epidote (Multiple purchase discount available)
Sold out Limited Edition of 16 Blue Stones (Bicolor Benitoite, Brazilian Paraiba Tourmaline, Santa Maria Aquamarine, etc.)

Limited Edition of 16 Blue Stones (Bicolor Benitoite, Brazilian Paraiba Tourmaline, Santa Maria Aquamarine, etc.)
Sold out Emerald Gacha (including Emerald Cat's Eye and special cuts) featuring Russian non-oil emeralds, etc. 💎 (Multiple purchase discount available)

Emerald Gacha (including Emerald Cat's Eye and special cuts) featuring Russian non-oil emeralds, etc. 💎 (Multiple purchase discount available)
Sold out Shimizu Precious Stones: Includes 7mm Dandelion Cut Morganite 💎 Morganite Gacha (Multiple Purchase Discounts Available)

Shimizu Precious Stones: Includes 7mm Dandelion Cut Morganite 💎 Morganite Gacha (Multiple Purchase Discounts Available)
Sold out Custom-made lucky bag for beginners💎 Includes two gemstones (one with a diamond), a CZ set, and a ring image holder (multiple purchase discounts available)

Custom-made lucky bag for beginners💎 Includes two gemstones (one with a diamond), a CZ set, and a ring image holder (multiple purchase discounts available)
Sold out [Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose

[Sakura Shape] Oregon Sunstone from the United States, 1.224ct Loose
Sold out Oregon Sunstone from the United States, 8.338ct loose stone

Oregon Sunstone from the United States, 8.338ct loose stone
Sold out Australian boulder opal 6.152ct loose

Australian boulder opal 6.152ct loose

Sold out Australian boulder opal 15.004ct loose stone

Australian boulder opal 15.004ct loose stone
Sold out Congo Cobalt Calcite 7.5mm/1.791ct Loose Stone

Congo Cobalt Calcite 7.5mm/1.791ct Loose Stone
Sold out Pakistani Triplite 1.107ct Loose Stone

Pakistani Triplite 1.107ct 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 Sri Lankan Forsterite 0.231ct Loose Stone, Japan-German

Sri Lankan Forsterite 0.231ct Loose Stone, Japan-German

Sold out 0.745ct loose bicolor sapphire from Windsor, Tanzania

0.745ct loose bicolor sapphire from Windsor, Tanzania

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.