【11/2 22時販売開始】《限定10石》バイカラーピンクタンザナイト原石含むタンザナイト原石ガチャ（平均4.2ct）《複数購入割引有》
Sale price¥6,980
【11/2 22時販売開始】《限定8石》コロンビア産マンゴークォーツ（最大60ct含む,平均21.6ct）《複数購入割引有》
Sale price¥2,980
American Peridot 0.283ct Loose Stone
Sale price¥8,800
Kunzite from Afghanistan 0.753ct loose stone
Sale price¥9,800
Tanzanian Zoisite 0.473ct Loose Stone
Sale price¥9,800
[12559917] Sunstone 1.355ct Loose
Sale price¥8,800
[12559858] Pakistani Peridot 0.517ct Loose Stone
Sale price¥9,800
[12559857] Pakistani Peridot 0.562ct Loose Stone
Sale price¥9,800
[12559763] Zimbabwean sphene 0.400ct loose stone
Sale price¥9,800
![[On sale November 1st at 10 PM] [Limited to 12 stones] Brazilian Indigolite Tourmaline Gacha Loose Stone (4x3mm, Oval Cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/PA230072.jpg?v=1761804822&width=4000)
![[On sale 10/31 at 10 PM] Limited to 10 stones: 0.20ct Yellow Diamond Loose Stone, Including Fancy Colors [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_64543983-1aef-497a-b59d-22c8da336a98.png?v=1761804115&width=2250)
![[On sale at 10 PM on October 10th] [Limited to 10 stones] Win one loose bicolor euclase gemstone from the bicolor gem gacha [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/2025-11-028.51.53.png?v=1762042677&width=1258)
![[On sale from 10/25 at 10 PM] Limited to 12 stones: Mexican Opal (Custom Faceted Cut) Loose Stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_563486d0-bfec-49f4-9cb5-32fe12701045.png?v=1761350349&width=2250)
![[On sale from 10/25 at 10 PM] Limited to 11 stones: Sakura-shaped Contralus Opal and a specially cut Opal Gacha with one loose stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/2025-10-258.06.34.png?v=1761347238&width=1250)
[On sale from 10/28 at 10pm] Rhodolite Garnet 1.270ct Loose Stone
Sale price¥7,980
[On Sale at 10pm on 10/28] Brazilian Citrine 1.659ct Loose Stone
Sale price¥9,800
[On Sale at 10pm on 10/28] Brazilian Citrine 1.644ct Loose Stone
Sale price¥9,800
[11/1 22:00 Sale] Brazilian Elestial Amethyst 0.970ct Loose Stone
Sale price¥7,980
[11/1 22:00 Sale] Brazilian Elestial Amethyst 0.762ct Loose Stone
Sale price¥8,800
[11/1 22:00 Sale] Brazilian Elestial Amethyst 1.586ct Loose Stone
Sale price¥8,800
[On Sale at 10pm on 10/28] Indian Moss Agate 0.915ct Loose Stone
Sale price¥8,800
[On Sale at 10 PM on 10/28] Mexican Fire Opal 4.8mm/0.199ct Loose
Sale price¥8,800
Sunstone (Illusion Sunstone) 0.844ct Loose
Sale price¥8,800
Sunstone (Illusion Sunstone) 0.895ct loose stone
Sale price¥8,800
Sri Lankan star sapphire 1.323ct loose
Sale price¥3,980
Sri Lankan star sapphire 1.061ct loose
Sale price¥3,980
Prehnite 5.3mm/0.469ct loose
Sale price¥3,980
Prehnite 5.6mm/0.565ct loose
Sale price¥3,980
Orange zircon 0.453ct loose
Sale price¥3,980
Pink zircon 0.508ct loose
Sale price¥6,980
Zircon 0.414ct loose
Sale price¥3,980
Goethite in Amethyst 0.806ct loose stone
Sale price¥4,980
Brazilian emerald cat's eye 0.459ct loose
Sale price¥5,980
Blue tourmaline from Afghanistan 0.209ct loose
Sale price¥2,980
Blue tourmaline from Afghanistan 3.5mm/0.178ct loose
Sale price¥3,980
Yellow tourmaline 0.431ct loose stone
Sale price¥3,980
Color change sapphire 0.283ct loose
Sale price¥3,980
Rutilated Quartz (Rutilated Quartz) 6.402ct Loose
Sale price¥3,980
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.
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.