![[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 10/19 at 10 PM] {Limited to 10 stones} Paraiba Tourmaline Gacha 💎 Paraiba Tourmaline or Paraiba Tourmaline in Quartz (1 loose stone) {Multiple purchase discounts available}](http://store.karatz.jp/cdn/shop/files/18_261a657f-9dba-46a6-9a8b-1805ad2c5b57.png?v=1760745196&width=4000)
![[4 stones left] Brazilian Dendritic Quartz Kitten Cut Loose Stone (For Beginners) (5mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_bee5ee11-c26d-47e0-9e94-2c270bbdf768.png?v=1760169992&width=2250)
【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
![[On sale 10/22 at 10 PM] Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/PA170328.jpg?v=1760920536&width=4000)
Illusion Bicolor Tourmaline 3.202ct Loose Stone
Sale price¥69,800
Brazilian green tourmaline 1.738ct loose stone
Sale price¥59,800
[12559552] Brazilian Dumortierite in Quartz 2.074ct Loose Stone
Sale price¥25,800
[11/2 22:00] Brazilian Pink Tourmaline 2.765ct Loose Stone
Sale price¥69,800
Indigolite Tourmaline 0.649ct Loose Stone
Sale price¥39,800
Indigolite Tourmaline 0.634ct Loose Stone
Sale price¥39,800
![[12559942] Tourmaline 0.486ct loose stone](http://store.karatz.jp/cdn/shop/files/PA305795_55fca4d3-369c-4cc4-aaee-763c1b3fb6f8.jpg?v=1762131095&width=3171)
[12559942] Tourmaline 0.486ct loose stone
Sale price¥29,800
![[12559941] Tourmaline 0.314ct loose stone](http://store.karatz.jp/cdn/shop/files/PA305765_e3b8e5c9-1dfa-4b76-993b-98fe883039ec.jpg?v=1762131095&width=3137)
[12559941] Tourmaline 0.314ct loose stone
Sale price¥22,800
![[12558255] Brazilian Pink Tourmaline 0.577ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA305204.jpg?v=1762293920&width=4000)
[12558255] Brazilian Pink Tourmaline 0.577ct Loose Stone
Sale price¥18,800
![[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)
[11/1 22:00 Sale] Brazilian Pink Tourmaline 1.515ct Loose Stone
Sale price¥98,000
[11/1 22:00 Sale] Brazilian London Blue Topaz 1.281ct Loose
Sale price¥12,800
[11/1 22:00 Sale] Brazilian London Blue Topaz 1.950ct Loose
Sale price¥15,800
Brazilian bicolor tourmaline 1.148ct loose
Sale price¥15,800
Brazilian bicolor tourmaline 1.056ct loose
Sale price¥12,800
Brazilian bicolor tourmaline 0.877ct loose
Sale price¥12,800
Rough diamond (makeable) 0.185ct loose (VS-SI)
Sale price¥19,800
Rough diamond (makeable) 0.345ct loose (VS-SI equivalent)
Sale price¥29,800
Bicolor tourmaline 5.825ct loose
Sale price¥128,000
Bicolor tourmaline 1.140ct loose
Sale price¥19,800
Bicolor tourmaline 0.707ct loose
Sale price¥12,800
Bicolor tourmaline 4.118ct loose
Sale price¥55,800
Tinker Bell Quartz (Pink Fire Quartz) 8.5mm/1.715ct Loose
Sale price¥25,800
Paraiba tourmaline from Brazil 0.129ct loose (CuO:0.8%,MnO:0.1%)
Sale price¥48,800
Paraiba tourmaline from Brazil 0.101ct loose (CuO:0.9%,MnO:0.1%)
Sale price¥39,800
Taaffeite from Myanmar 0.580ct Ruth Japanese German edition
Sale price¥39,800
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
Brazilian bicolor tourmaline 3.291ct loose
Sale price¥35,800
Brazilian bicolor tourmaline 3.569ct loose
Sale price¥35,800
Bicolor tourmaline 0.669ct loose (rose cut)
Sale price¥8,800
Bicolor tourmaline 0.549ct loose (rose cut)
Sale price¥8,800
![[On sale from 10/22 at 10 PM] Limited to 14 stones: Lab-grown diamond (cabochon cut, approximately 2.3mm) - 1 loose diamond [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_69e68b54-0eb4-42e4-9bf1-bd9f3830d208.png?v=1760920748&width=2250)
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.