Skip to content

Pre-sale

Sort by

Sold out Golden Hill Turquoise from Kazakhstan, 2.882ct loose stone
Sold out Golden Hill Turquoise from Kazakhstan, 2.235ct loose stone
Sold out Unmounted American Anthill Garnet, 4.0mm/0.269ct
Sold out American Anthill Garnet 5.0mm/0.641ct Loose
Sold out USA Ant Hill Garnet 4.0mm/0.277ct Loose Stone
Sold out US Oregon Sunstone, 1.640 ct, Loose
Sold out US Oregon Sunstone, 1.640 ct, Loose
Sold out 1.676ct loose Oregon sunstone from the United States
Sold out USA Oregon Sunstone 2.160ct Loose
Sold out USA Oregon Sunstone 1.869ct Loose
Sold out 0.628ct Pink Star Sapphire Loose Gemstone from Sri Lanka
Sold out Canadian rough diamond (sawable) 0.099ct rough with trigon
coming soon チベット産バイカラーアンデシン 1.856ctルース
coming soon Myanmar orange jade (jade) 0.531ct loose
Sold out インド産カバンサイト 2.163ctルース
Sold out タンザニア産レピドライト 1.035ctルース
Sold out Mali Garnet (Grossular/Andradite Garnet) from Mali 0.359ct Loose Stone
Sold out Hessonite Garnet from Sri Lanka 0.681ct Loose
Sold out Hessonite Garnet from Sri Lanka 0.530ct Loose Gemstone
Sold out Tanzanian Almandine Garnet 0.586ct Loose
Sold out Cambodian Blue Zircon (Ratanakiri Blue) 0.537ct Loose
Sold out 0.218ct Unheated Silky Pink Sapphire from Vietnam
Sold out 0.168ct Unheated Silky Pink Sapphire from Vietnam
Sold out Kunzite from Afghanistan 0.971ct loose stone
Sold out Mexican Water Opal 4.8mm/0.289ct Loose
Sold out Sri Lankan green zircon 0.312ct loose stone
Sold out Mexican fire opal 0.235ct loose (facet cut)
Sold out Russian Phenakite 0.615ct Loose Stone
Sold out Bekiri Blue Garnet (Color Change Garnet) from Madagascar 0.150ct Loose
Sold out Madagascar Bekily Blue Garnet (Color Change Garnet) 0.132ct Loose Stone
Sold out 0.915ct Loose Ludwigite in Peridot from Pakistan
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.594ct loose stone with certificate of authenticity
Sold out Brazilian unheated pink imperial topaz (sherry pink) 0.438ct loose stone with certificate of authenticity
Sold out American benitoite 0.076ct loose
Sold out パキスタン産オイルインクォーツ 0.325ctルース
Sold out パキスタン産オイルインクォーツ 0.361ctルース
Sold out 【12546496掲載】ベトナム産非加熱シルキーピンクサファイア 0.161ctルース
Sold out Star Ruby from Sri Lanka, 5.0mm/1.062ct Loose Stone, with Identification Report
Sold out Grandidierite from Madagascar 0.228ct loose stone
Sold out 《Limited to 16 stones》Cornflower Blue Sapphire with AIGS certificate, Royal Blue Sapphire with certificate, (Plus a beautiful yellow sapphire worth 5,980 yen as a bonus) 💎Blue Sapphire Gacha 《Multiple purchase discount available》
Sold out 《Limited to 15 Stones》Kornerupine Gacha💎Win a 0.413ct Kornerupine (Prismatine) from Tanzania with a Japanese and German Gemstone Report (Plus a Free Kornerupine from Ken's Collection)《Bulk Purchase Discount Available》
Sold out Afghan Kunzite 5.6mm/0.897ct Loose
Sold out Loose Brazilian Medusa Quartz (Paraiba Quartz) 0.748ct
Sold out Brazilian Dumortierite in Quartz 1.736ct Loose
Sold out Kenyan Tsavorite 0.157ct Loose Gemstone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.867ct Loose Stone
Sold out Madagascar Andesine Labradorite (commonly known as Rainbow Moonstone) 4.894ct Loose Stone
Sold out 0.321ct Blue Sapphire Loose Gemstone from Sri Lanka

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.