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Sold out アベンチュリンアクアマリン 1.888ctルース

Aventurine aquamarine 1.888ct loose
Sold out アンデシン・ラブラドライト（通称名 ブルームーンストーン） 0.272ctルース

[Mr. Sanjay] Andesine Labradorite (commonly known as Blue Moonstone) 0.272ct loose
Sold out [Mr. Sanjay] Andesine Labradorite (commonly known as Rainbow Moonstone) 0.236ct loose

[Mr. Sanjay] Andesine Labradorite (commonly known as Rainbow Moonstone) 0.236ct loose
Sold out アンデシン・ラブラドライト（通称名 ブルームーンストーン） 0.370ctルース

Andesine labradorite (common name: Blue Moonstone) 0.370ct loose
Sold out オレゴンサンストーン 0.368ctルース

[Mr. Sanjay] Oregon Sunstone 0.368ct Ruth
Sold out カルセドニー 6.183ctルース

[Cat cut] Chalcedony 6.183ct loose (Siamese cat cut)
Sold out ルビー 0.730ctルース

Ruby 0.730ct Ruth Japanese-German book
Sold out 北海道産ロードクロサイト 0.758ctルース

Hokkaido rhodochrosite 0.758ct loose
Sold out 北海道産ロードクロサイト 0.566ctルース

Hokkaido rhodochrosite 0.566ct loose
Sold out 北海道産ロードクロサイト 0.633ctルース

Hokkaido rhodochrosite 0.633ct loose
Sold out 北海道産ロードクロサイト 0.835ctルース

Hokkaido rhodochrosite 0.835ct loose
Sold out 北海道産ロードクロサイト 0.667ctルース

Hokkaido rhodochrosite 0.667ct loose
Sold out 北海道産ロードクロサイト 0.630ctルース

Hokkaido rhodochrosite 0.630ct loose
Sold out 北海道産ロードクロサイト 0.605ctルース

Hokkaido rhodochrosite 0.605ct loose
Sold out アフガニスタン産バイカラートルマリン 3.641ct原石

Bicolor tourmaline 3.641ct rough stone from Afghanistan
Sold out 《Yurakucho Marui 2024112 takeout》 Padparadscha sapphire 0.326ct loose DGL

《Yurakucho Marui 2024112 takeout》 Padparadscha sapphire 0.326ct loose DGL
Sold out パパラチアサファイア 0.318ctルース

Padparadscha sapphire 0.318ct loose DGL version

Sold out 非加熱ブラジル産パライバトルマリン 0.040ctルース AIGS

Unheated Brazilian Paraiba Tourmaline 0.040ct Loose Stone AIGS
Sold out ブラジル産アレキサンドライトキャッツアイ 0.435ctルース（ヘマチタ鉱山）

Brazilian alexandrite cat's eye 0.435ct loose (Hemachita mine)
Sold out ベトナム産アクアマリン 3.540ct原石

Aquamarine 3.540ct rough stone from Vietnam
Sold out 【山本武氏】ロッククリスタル 126.701ctルース

[Mr. Takeshi Yamamoto] Rock crystal 126.701ct loose
Sold out 【山本武氏】アメジスト 9.100ctルース

[Mr. Takeshi Yamamoto] Amethyst 9.100ct loose
Sold out ブラジル産トラピッチェアメジスト 7.179ctルース

Brazilian Trapichea Amethyst 7.179ct loose
Sold out 【ダンデライオンカット】カラーシフトアメジスト 22mm/36.415ct《コラボ》ルース（6枚花びら） ワッペン付

[Dandelion cut] Color shift amethyst 22mm/36.415ct 《Collaboration》 Loose (6 petals) Patch included

Sold out 【金平糖】カラーシフトアメジスト 3.026ctルース

[Konpeito] Color shift amethyst 3.026ct loose

Sold out ブラジル産パライバトルマリン 0.447ctルース（CuO:1.0%、MnO:3.6%）

Brazilian Paraiba tourmaline 0.447ct loose (CuO:1.0%, MnO:3.6%)
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Light Pink) 1 stone loose (multiple purchase discount available)
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Intense Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Intense Pink) 1 stone loose (multiple purchase discount available)
Sold out Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Vivid Pink) 1 stone loose (multiple purchase discount available)

Lab-grown pink diamond (2mm, synthetic pink diamond, about Fancy Vivid Pink) 1 stone loose (multiple purchase discount available)
Sold out Finnish Spectrolite 1 Stone Loose {Multiple Purchase Discount}

Finnish Spectrolite 1 Stone Loose {Multiple Purchase Discount}
Sold out 1 bicolor sapphire (cabochon cut)《Multiple purchase discount》

1 bicolor sapphire (cabochon cut)《Multiple purchase discount》

Sold out 1 Yellow Opal (October birthstone, faceted cut) {Multiple purchase discount}

1 Yellow Opal (October birthstone, faceted cut) {Multiple purchase discount}
Sold out [3 stones remaining] 1 rough Russian uvarovite garnet [Multiple purchase discounts available]

[3 stones remaining] 1 rough Russian uvarovite garnet [Multiple purchase discounts available]
Sold out Synthetic moissanite 1 stone loose (blue moissanite, 2.0mm)《Multiple purchase discount available》

Synthetic moissanite 1 stone loose (blue moissanite, 2.0mm)《Multiple purchase discount available》
Sold out Mexican Hyalite Opal 2.822ct Loose (Faceted Cut)

Mexican Hyalite Opal 2.822ct Loose (Faceted Cut)
Sold out Mexican Hyalite Opal 1.871ct Loose (Faceted Cut)

Mexican Hyalite Opal 1.871ct Loose (Faceted Cut)
Sold out Green zircon 4.361ct loose

Green zircon 4.361ct loose
Sold out スリランカ産コバルトガーナイト 0.156ctルース

Cobalt Garnite 0.156ct loose
Sold out イエローダイヤモンド（トリートメント） 0.091ルース(FANCY VIVID YELLOW, VVS2)

Yellow Diamond (Treatment) 0.091 Loose (FANCY VIVID YELLOW, VVS2)
Sold out Pink Diamond 2.5mm/0.025 Loose (FANCY PURPLISH PINK, SI2)

Pink Diamond 2.5mm/0.025 Loose (FANCY PURPLISH PINK, SI2)
Sold out Pink diamond 0.042ct loose (FANCY INTENSE PINK, SI2)

Pink diamond 0.042ct loose (FANCY INTENSE PINK, SI2)
Sold out エチオピア産オパール 6.840ct原石

Ethiopian opal 6.840ct rough stone
Sold out エチオピア産オパール 5.572ct原石

Ethiopian opal 5.572ct rough stone
Sold out ナイジェリア産バイカラートルマリン 6.495ct原石

Bicolor tourmaline 6.495ct raw stone from Nigeria
Sold out ザンビア産アメジスト 49.331ct原石

Amethyst 49.331ct raw stone from Zambia
Sold out ザンビア産アメジスト 27.315ct原石

Amethyst 27.315ct raw stone from Zambia
Sold out フィンランド産ラブラドライト（スペクトロライト） 12.698ctルース

Labradorite (Spectrolite) from Finland 12.698ct loose
Sold out フィンランド産ラブラドライト（スペクトロライト） 9.628ctルース

Labradorite (Spectrolite) from Finland 9.628ct 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