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Width: 4.1 - 5.0mm

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Sold out Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture 4.8mm/0.612ct Loose
Sold out Pink sapphire (with hematite) 0.271ct loose stone
Sold out 0.745ct loose bicolor sapphire from Windsor, Tanzania
Sold out Sri Lankan Forsterite 0.231ct Loose Stone, Japan-German
Sold out Pakistani Triplite 1.107ct Loose Stone
Sold out Mexican Fire Opal 0.281ct Loose
Sold out Tanzanite from Tanzania 4.5mm/0.390ct Loose Stone AIGS
Sold out Indian Parrot Chrysoberyl 4.2mm/0.347ct Loose Stone
Sold out Mexican Fire Opal 0.362ct Loose
Sold out USA Oregon Sunstone 5.0mm/0.443ct Loose
Sold out Brazilian Imperial Topaz, 0.353 ct loose stone
Sold out Burmese Ice Jadeite, 0.408ct loose stone
Sold out Madagascar Sphene 4.5mm/0.509ct Loose Gemstone
Sold out Mexican Fire Opal (Faceted) 4.5mm/0.218ct Loose Stone
Sold out American Anthill Garnet 5.0mm/0.641ct Loose
Sold out Hessonite Garnet from Sri Lanka 0.681ct Loose
Sold out Tanzanian Almandine Garnet 0.586ct Loose
Sold out Madagascar Purple Sapphire 4.2mm/0.418ct Loose
Sold out Mexican Water Opal 4.8mm/0.289ct Loose
Sold out Sri Lankan green zircon 0.312ct loose stone
Sold out 0.915ct Loose Ludwigite in Peridot from Pakistan
Sold out 0.939 ct Loose Imperial Topaz from Brazil with Certificate
Sold out Loose 0.901ct Imperial Topaz from Brazil with certificate
Sold out Star Ruby from Sri Lanka, 5.0mm/1.062ct Loose Stone, with Identification Report
Sold out Loose Brazilian Medusa Quartz (Paraiba Quartz) 0.748ct
Sold out ジンバブエ産スフェーン 0.477ctルース
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 0.498ct Loose Stone
Sold out Madagascar Andesine Labradorite (also known as Rainbow Moonstone) 0.491ct Loose Stone
Sold out Australian black opal 0.435ct loose stone
Sold out Brazilian bicolor tourmaline 1.016ct loose stone
Sold out Sri Lankan Yellow Sapphire 0.526ct Loose
Sold out 【12560359掲載】ジンバブエ産バイカラーユークレース 0.654ctルース
Sold out Rough diamond (sawable) 0.466ct rough diamond (with trigon)
Sold out Tanzanian Violet Sapphire 0.920ct Loose
Sold out Indian Parrot Chrysoberyl Cat's Eye 5.0mm/1.099ct Loose Stone
Sold out 0.848ct Loose Brazilian Medusa Quartz (Paraiba Quartz)
Sold out Royal Blue Sapphire 1.00ct Loose AIGS
Sold out 0.361ct loose Brazilian Paraiba Tourmaline (CuO:1.0%, MnO:3.6%)
Sold out Unheated Pigeon Blood Ruby 0.710ct Loose Stone AIGS
Sold out Indian Moonstone 5.0mm/0.474ct Loose Stone (Rose Cut)
Sold out Russian Demantoid Garnet (Horsetail) 4.2mm/0.325ct Loose Stone
Sold out [On Sale at 10 PM on December 7th] Madagascar Andesine Labradorite Moonstone (also known as Rainbow Moonstone) 0.178ct Loose Stone
Sold out [12/7 22:00] Sri Lankan Yellow Sapphire 0.508ct Loose
Sold out [12/9 22:00 Sale] Sinhalite from Sri Lanka 0.658ct Loose Stone
Sold out [12/10 22:00 Sale] Pakistani Ludwigite Peridot 0.609ct Loose Stone
Sold out Mali Garnet (Grossular/Andradite Garnet) 0.811ct Loose Stone from the Republic of Mali with Certificate of Authenticity
Sold out Mozambique ruby ​​0.537ct loose stone
Sold out Australian boulder opal 2.326ct 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.

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.