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0.3ct - 0.5ct

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Sold out 0.243ct Colombian Emerald Pair Loose Stones
Sold out 0.316 ct Tanzanian Bicolor Grossular Garnet Loose Stone
Sold out U.S. Red Beryl 3.2mm/0.111ct Loose Stone
Sold out USA Oregon Sunstone 5.0mm/0.443ct Loose
Sold out Grandidierite from Madagascar 0.269ct loose stone
Sold out Brazilian Imperial Topaz, 0.353 ct loose stone
Sold out Burmese Ice Jadeite, 0.408ct loose stone
Sold out Kenyan Tsavorite 0.347ct Loose Stone
Sold out Pigeon blood ruby ​​0.310ct loose
Sold out Pigeon's Blood Ruby 4.0mm/0.230ct Loose AIGS
Sold out Tanzanite from Tanzania 0.417ct Loose Gemstone
Sold out パパラチアサファイア 0.191ctルース
Sold out Mexican Fire Opal (Faceted) 4.5mm/0.218ct Loose Stone
Sold out 0.278 ct loose Nigerian cobalt gahnite with Japanese and German appraisals
Sold out Ruby 0.258ct loose
Sold out Unmounted American Anthill Garnet, 4.0mm/0.269ct
Sold out USA Ant Hill Garnet 4.0mm/0.277ct Loose Stone
Sold out Mali Garnet (Grossular/Andradite Garnet) from Mali 0.359ct Loose Stone
Sold out Madagascar Purple Sapphire 4.2mm/0.418ct Loose
Sold out Unheated Vietnamese Silky Pink Sapphire 0.291ct Loose Stone
Sold out 0.218ct Unheated Silky Pink Sapphire from Vietnam
Sold out 0.168ct Unheated Silky Pink Sapphire from Vietnam
Sold out Tanzanian Mandarin Garnet Loose Stone 0.315ct
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 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 Brazilian unheated pink imperial topaz (sherry pink) 0.438ct loose stone with certificate of authenticity
Sold out Colombian oil-free emerald 0.17ct loose GIA
Sold out Grandidierite from Madagascar 0.228ct loose stone
Sold out Brazilian Indicolite Tourmaline 0.342ct Loose
Sold out Kenyan Tsavorite 0.157ct Loose Gemstone
Sold out 0.321ct Blue Sapphire Loose Gemstone from Sri Lanka
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 【12560350掲載】ジンバブエ産ユークレース 0.138ctルース
Sold out Rough diamond (sawable) 0.466ct rough diamond (with trigon)
Sold out 0.245ct rough diamond (with trigon)
Sold out Mozambique Ruby 0.481ct Loose Stone with Certificate of Authenticity
Sold out Tanzanian Kornerupine 0.103ct Loose Stone
Sold out Afghanistan Blue Tourmaline 4.0mm/0.268ct Loose Stone (Lagoon Tourmaline)
Sold out Unheated Burmese Ruby 0.227ct Loose Stone, Nikko Kan
Sold out Cornflower Blue Sapphire 4.5mm/0.430ct Loose Stone AIGS
Sold out Grandidierite from Madagascar 0.167ct loose stone

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.