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colored stone loose

A list of colored stones and loose gemstones.

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Sold out シンシャ（辰砂・シナバー） 1.171ctルース

Chinese Cinnabar (Cinnabar) 1.171ct Loose Stone (Faceted) with Certificate of Authenticity
Sold out シンシャ（辰砂・シナバー） 1.155ctルース

Chinese Cinnabar (Cinnabar) 1.155ct Loose Stone (Faceted) with Certificate of Authenticity
Sold out 中国産シンシャ（辰砂・シナバー） 1.035ctルース

Chinese Cinnabar (Cinnabar) 1.035ct Loose Stone
Sold out 中国産辰砂（シンシャ・シナバー）0.884ctルース（ファセットカット） 鑑別書

Chinese Cinnabar (Xinsha/Cinnabar) 0.884ct Loose Stone (Faceted) with Certificate of Authenticity
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.064ctルース

Russian Demantoid Garnet (Horsetail) 0.064ct Loose Stone
Sold out ロシア産デマントイドガーネット（ホーステール認む） 0.061ctルース

Russian Demantoid Garnet (Horsetail) 0.061ct Loose Stone
Sold out Limited Edition of 11 Rare Stones! 💎 Two 0.23ct Paraiba Tourmalines from Batalha, Brazil, a Pink Diamond, and a Benitoite Loose Stone. Discounts available for multiple purchases.

Limited Edition of 11 Rare Stones! 💎 Two 0.23ct Paraiba Tourmalines from Batalha, Brazil, a Pink Diamond, and a Benitoite Loose Stone. Discounts available for multiple purchases.
Sold out One loose, oil-free emerald from Russia (2.8mm, round cut) (Multiple purchase discounts available)

One loose, oil-free emerald from Russia (2.8mm, round cut) (Multiple purchase discounts available)
Sold out Limited to 6 stones: One loose, oil-free emerald from Russia (3.2mm, round cut) [Multiple purchase discounts available]

Limited to 6 stones: One loose, oil-free emerald from Russia (3.2mm, round cut) [Multiple purchase discounts available]
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） 4.868ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 4.868ct Loose Stone

Sold out Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (multiple purchase discounts available)

Limited to 3 stones: Myanmar gray spinel and platinum spinel (4.0mm, round cut) loose stone (multiple purchase discounts available)

Sold out Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Sold out Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

coming soon [Sakura In-Cut] Sapphire from Ratnapura, Sri Lanka, 6.0mm/0.839ct Loose

[Sakura In-Cut] Sapphire from Ratnapura, Sri Lanka, 6.0mm/0.839ct Loose Sale price¥59,800
Sold out ペルー産バイカラーブルーオパール 0.492ctルース

Peruvian bicolor blue opal 0.492ct loose stone

Sold out 非加熱ロイヤルブルーサファイア 0.640ctルース AIGS

Unheated Royal Blue Sapphire 0.640ct Loose AIGS

Sold out ピジョンブラッドルビー 3.7mm/0.230ctルース AIGS

Pigeon Blood Ruby 3.7mm/0.230ct Loose Stone AIGS

Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.231ct loose stone

Brazilian unheated pink imperial topaz (sherry pink) 0.231ct loose stone

Sold out ブラジル産レインボーアクアマリン 2.698ctルース

Brazilian Rainbow Aquamarine (Iridescent Aquamarine) 2.698ct Loose Stone
Sold out ブラジル産ルベライト 2.588ctルース

Brazilian Rubellite 2.588ct Loose Stone

Sold out Limited to 20 stones! Koshu Kiriko Plus Three: Includes two carefully cut Oregon Sunstones. Includes one loose stone. Discounts available for multiple purchases.

Limited to 20 stones! Koshu Kiriko Plus Three: Includes two carefully cut Oregon Sunstones. Includes one loose stone. Discounts available for multiple purchases.
Sold out スペイン産バイカラースファレライト 0.727ctルース

0.727ct Bicolor Sphalerite Loose Stone from Spain
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） 0.577ctルース

Rainbow Garnet (Andradite Garnet) 0.577ct Loose Stone from Tenkawa Village, Nara Prefecture
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） 0.439ctルース

Rainbow Garnet (Andradite Garnet) 0.439ct Loose Stone from Tenkawa Village, Nara Prefecture
Sold out ブラジル産ゴーシェナイト 1.611ctルース

Brazilian Goshenite 1.611ct loose stone
Sold out パパラチアサファイア 0.376ctルース

[Shinjuku Marui Annex 202511] Padparadscha Sapphire 0.376ct Loose Stone (Chuhokan)
Sold out バイカラーゾイサイト 0.703ctルース

Tanzanian Bicolor Zoisite 5.5mm/0.703ct Loose Stone
Sold out バイカラーゾイサイト 0.745ctルース

Tanzanian Bicolor Zoisite 5.5mm/0.745ct Loose Stone
coming soon スリランカ産スターサファイア 3.928ctルース

【1/9 22時販売】スリランカ産ツインスターサファイア 3.928ctルース Sale price¥128,000
coming soon スリランカ産スターサファイア 1.743ctルース

【1/9 22時販売】スリランカ産トリプルスターサファイア 1.743ctルース Sale price¥128,000
coming soon スリランカ産スターサファイア 5.225ctルース

【1/9 22時販売】スリランカ産ツインスターサファイア 5.225ctルース Sale price¥98,000

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.