Ha line

Petalite 1 stone loose (6mm, round cut)《Multiple purchase discount available》 Sale price¥2,580

[On Sale August 2nd at 10 PM JST] Limited to 12 Stones: Blue Gemstone Gacha (Paraiba Tourmaline, Euclase, Tanzanite, etc.) + 1 Aquamarine Stone Included (Bulk Purchase Discount Available) Sale price¥7,980

[Limited to 26 gems] Indian Kerala Chrysoberyl Cat's Eye (neon green-yellow color / mini size) [Multiple purchase discount available] Sale price¥1,580

Limited to 10 stones: Australian Opal Lottery with Certificate of Authenticity (including Australian Black Opal) (plus 1 Mexican Fire Opal) (Multiple purchase discounts available) Sale price¥6,980

Chinese color change fluorite 1 stone loose (7mm, round cut) {Multiple purchase discount available} Sale price¥2,580

[Option] Paraiba Tourmaline component analysis sorting issuance fee Sale price¥5,000

Limited to 9 stones, 1 Nigerian green beryl loose stone, multiple purchase discount available Sale price¥3,980

Limited to 17 stones: 1 Brazilian green beryl loose stone. Discounts available for multiple purchases. Sale price¥2,580

《Limited to 10 Gemstones》Sri Lankan Chrysoberyl (Cut by Mr. Sanje) Gacha (Includes Parrot Color, Canary Yellow)《Multiple Purchase Discount Available》 Sale price¥3,980

Limited to 9 Stones: Untreated Bicolor and Sky Blue Topaz 1-Stone Gacha (Brazilian) (Bulk Purchase Discount Available) Sale price¥6,980

《Limited to 11 stones》Koshu Kiseki Kiriko plusthree Peridot (including lilypad) & Monsieur Saint-Jude cut peridot gacha《Multiple purchase discount available》 Sale price¥4,980

Central Gem Research Institute Non-heated Issuance fee for certificate of authenticity (optional) Sale price¥10,000

《Limited 4 Stones》Needle In Blue Topaz Gacha 💎 Average 45ct《Bulk Purchase Discount Available》 Sale price¥9,800

《Limited to 12 Stones》Russian Phenakite 1 Stone Loose (Average 0.35ct) 《Multiple Purchase Discount Available》 Sale price¥9,800

Limited to 8 stones: 1 Mexican fire opal loose stone with unique color (up to 2.2ct) Multiple purchase discounts available Sale price¥3,980

Set of two fluorite rough stones from Diana Maria and Lady Annabella, UK (multiple purchase discounts available) Sale price¥3,980

K18YG Brazilian Paraiba Tourmaline Ring (Flucche Setting, Pear Shape, Matte Finish) Sale price¥69,800

Brazilian Paraiba Tourmaline Ring and Half Eternity Ring Set (1.2mm) Sale price¥198,000

[Option] Paraiba tourmaline analysis report attached identification certificate issuance fee Sale price¥15,000

Limited to 9 stones: 1 rough petalite stone from Myanmar (average 6.0 carats) Multiple purchase discounts available Sale price¥2,980

Limited to 27 stones: Peridot (Trilliant Cut) 1 stone (5.0-5.5mm) Multiple purchase discounts available Sale price¥6,980

Limited to 9 stones: 1 Brazilian green beryl loose stone. Discounts available for multiple purchases. Sale price¥3,580

Limited to 7 stones: 1 loose Australian boulder opal (average 25 carats) Multiple purchase discounts available Sale price¥8,800

Limited to 8 stones: Swiss blue topaz (4mm, rose cut) 1 loose stone. Discounts available for multiple purchases. Sale price¥3,980

Mexican Hyalite Opal 2.592ct loose Sale price¥9,800

[On sale August 1 at 10 PM] Australian black opal 0.702 ct loose stone with certificate Sale price¥29,800

Brazil Color Change Fluorite 1.099ct Loose Stone Sale price¥9,800

Madagascar Padparadscha Sapphire 3.4mm/0.208ct Loose Gem with Central Gem Laboratory Appraisal Sale price¥45,800

Madagascar Paparadscha Sapphire 3.5mm/0.234ct Loose Stone, Central Gem Lab certified Sale price¥49,800

Brazilian Golden Beryl 7.2mm/1.369ct Loose Stone with Certificate of Authenticity (Sale begins August 2nd at 10 PM JST) Sale price¥7,980

[Listed as 12563246] Mexican Fire Opal 1.115ct Loose Sale price¥25,800

0.522ct bicolor sapphire loose stone from Madagascar Sale price¥6,980

Brazilian yellow beryl, 1.472 ct loose Sale price¥19,800

Pt950/K18 パライバトルマリン 0.11ct（CuO:2.7%,MnO:3.4%）・ダイヤモンド1.12ctリング　宝貴協

[On sale August 2 at 10 PM] [ColorFuli] Pt950/K18 Paraiba Tourmaline 0.11ct (CuO:2.7%, MnO:3.4%) and Diamond 1.12ct Ring - Houki-kyo Sale price¥188,000

1.082ct Loose Australian Black Opal with Certification Sale price¥69,800

Australian Black Opal 1.066ct Loose Sale price¥69,800

Australian Black Opal 0.778ct Loose Sale price¥35,800

[Sales begin 8/3 at 10 PM JST] Australian Black Opal 0.957ct Loose Stone with Appraisal Sale price¥49,800

[12558084 posted] Benitoite 0.190ct Loose, with identification report, Made in America Benitoite 0.158ct Loose, with identification report Benitoite 0.190ct Loose, with identification report Sale price¥118,000

[Listed 12563403] Petzottaite from Madagascar 0.200ct Loose Sale price¥29,800

Pt900 ブラックオパール 0.58ct ペンダントトップ（ネックレストップ）鑑別書

【Colorfleur】Pt900 Black Opal 0.58ct Pendant Top with Authenticity Card Sale price¥55,800

Pt900 ブラックオパール 0.66ct ペンダントトップ（ネックレストップ）鑑別書

[COLORFUL] Pt900 Black Opal 0.66ct Pendant Top (Necklace Top) with Identification Card Sale price¥55,800

Brazilian Paraiba Tourmaline 2.9mm/0.090ct Loose (CuO:1.7% MnO:1.4%) Sale price¥69,800

Paraiba tourmaline from Brazil 0.086ct loose Sale price¥79,800

Madagascar padparadscha sapphire 3.3mm/0.156ct loose stone (with CGL certificate) Sale price¥29,800

Madagascar Padparadscha Sapphire 4.5mm/0.416ct Loose Gemstone, Central Gemology Laboratory certified Sale price¥98,000

【甲州貴石切子plusthree】メキシコ産ファイアオパール 4.633ctルース《コラボ》ワッペン

[Koshu Precious Stones plusthree] Mexican Fire Opal 4.633ct Loose Stone [Collaboration] Patch Sale price¥49,800

Sri Lankan Chrysoberyl Cat's Eye 1.514ct Loose Stone Sale price¥5,980

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.