0.5–1.0 ct

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リヒテライト 0.954ctルース - KARATZ STORE｜カラッツSTORE

Paudrettite 0.677ct loose Japanese and German included

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ブラジル産パライバトルマリン 0.607ctルース - KARATZ STORE｜カラッツSTORE

Paraiba tourmaline from Brazil 0.607ct loose

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非加熱ブルーサファイア 0.82ctルース AIGS付 - KARATZ STORE｜カラッツSTORE

Unheated blue sapphire 0.82ct loose with AIGS

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非加熱ブルーサファイア 0.93ctルース AIGS付 - KARATZ STORE｜カラッツSTORE

Unheated blue sapphire 0.93ct loose with AIGS

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モザンビーク産パライバトルマリン 0.968ctルース - KARATZ STORE｜カラッツSTORE

Paraiba tourmaline from Mozambique 0.968ct loose

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ジェレメジェバイト 0.875ctルース - KARATZ STORE｜カラッツSTORE

Musgravite 0.519ct loose Japanese-German appraisal

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ペリドット 0.913ctルース - KARATZ STORE｜カラッツSTORE

Pigeon blood ruby 0.54ct loose with AIGS

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パパラチアサファイア 0.50ctルース GIA付 - KARATZ STORE｜カラッツSTORE

Padparadscha sapphire 0.50ct loose with GIA

[Lottery Sale_05][For Winners Only][Item No. 12564366] Burmese Unheated Color-Change Sapphire 0.750ct Loose Stone GIA Sale price¥158,000

【11/3 22時販売】タンザニア産タンザナイト 0.934ctルース Sale price¥16,800

【11/3 22時販売】タンザニア産タンザナイト 0.874ctルース Sale price¥17,800

【11/3 22時販売】タンザニア産タンザナイト 5.7mm/0.861ctルース Sale price¥15,800

【11/3 22時販売】タンザニア産クロムトルマリン 0.543ctルース Sale price¥15,800

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Brazilian Pink Tourmaline 0.628ct Loose Stone

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[Item 12564594] Sri Lankan Uva Moonstone 0.566ct Loose Stone

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[12564127 listed] Apatite 0.764ct loose stone

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[Item 12564305] Brazilian Emerald Cat's Eye 0.515ct Loose Stone

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[Available 10/10 at 10 PM] Brazilian Dumortierite in Quartz 0.757ct Loose Gemstone

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[10/11 10 PM Sale] Indian Iolite Sunstone 0.866ct Loose Stone

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[Deadline: Sun, Nov 1, 10:00 AM: Lottery Sale] Brazilian Paraiba Tourmaline 0.590ct Loose Stone (CuO: 1.4%, MnO: 3.4%) GIA

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[10/21 (Wed) 10:00 AM Deadline: Lottery Sale] Sri Lankan Unheated Sapphire 0.900ct Loose Stone GIA

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[Deadline: Wed, Oct 21, 10:00 AM: Lottery Sale] Sri Lankan Unheated Sapphire 0.820ct Loose Stone GIA

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[Deadline: Wed, Oct 21, 10:00 AM: Lottery Sale] Chrome Tourmaline 0.664ct Loose Gemstone (with Pyrite Inclusions)

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[Deadline: Wed, 10/21 at 10 AM: Lottery Sale] Graphite in Orthoclase 0.724ct Loose Stone, GGL Certified

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[Lottery Sale ②_202608_04] Unheated Kashmir Sapphire 0.710ct Loose Stone GIA

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[Mon, Sep 14, 10:00 AM Deadline: Lottery Sale_09] Unheated Pigeon Blood Ruby 0.620ct Loose Stone AIGS

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[Item 12564367] Unheated Sri Lankan Purple Sapphire 0.870ct Loose Stone GIA

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[Deadline: Sat, Sep 5, 10:00 AM: Lottery Sale_05] Colombian Non-Oiled Emerald 5.3mm/0.600ct Loose Stone GIA

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[On sale 9/26 at 10 PM] Australian Rainbow Lattice Sunstone 0.748ct Loose Stone

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[Available 10/1 at 10 PM] Australian Teal Blue Sapphire 0.555ct Loose Stone

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Sri Lanka Unheated Pink Sapphire 0.750ct Loose Stone GIA

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[Deadline: Wed, Oct 21, 10:00 AM: Lottery Sale] Sri Lankan Unheated Purple Sapphire (Color-shift type) 0.620ct Loose Stone GIA

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[Available 9/26 at 10 PM] Sri Lankan Green Zircon 0.643ct Loose Gemstone

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[Available 9/21 at 10 PM] Sri Lankan Blue Sapphire 5.3mm/0.754ct Loose Stone

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[Available 9/27 at 10 PM] Cacholong Amethyst 0.531ct Loose Stone

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[9/27 22:00 Release] Brazilian Sky Blue Topaz 0.830ct Loose Gemstone

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[Available 9/27 at 10 PM] Madagascar Sphene 0.625ct Loose Gemstone

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Colombian pyrite-mica emerald 0.739ct loose stone

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Russian Demantoid Garnet (Horsetail) 5.8mm/0.851ct Loose Stone

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[Available 9/14, 10:00 PM] Russian Phenakite from Malyshevo, 0.957ct Loose Stone, JGL Certified

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[Available Sept. 12, 10:00 PM] Sri Lankan Silky Pink Sapphire 5.0mm/0.544ct Loose Gemstone with Identification Report

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[Available 9/12, 10 PM] Sri Lankan Blue Sapphire 0.680ct Loose Gemstone with Identification Report

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[Available Sept 13, 10 PM] Australian White Opal 0.584ct Loose Stone (Rose Cut)

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[On sale 9/17 at 22:00] Kenya Unheated Gold Sheen Sapphire 0.531ct Loose Gemstone with Identification Report

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[Available 9/13, 10:00 PM] Pink Cobalt Calcite from Spain, 0.520ct Loose Stone with Certificate of Authenticity

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.