![[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)
![[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)
【11/8 22時販売】《限定7石》インド産アイオライトサンストーン1石ルース (サンジェ氏のカスタムカット) 《複数購入割引有》
Sale price¥5,980
![[Sales start November 2nd at 10 PM] [Limited to 10 stones] Tanzanite rough gacha including bicolor pink tanzanite rough (average 4.2 carats) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_5799e77a-97c8-4d6c-b77b-dec5271cc0a0.png?v=1762053625&width=2250)
![[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)
![[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)
【11/8 22時販売】《限定9石》カービングガチャ（オパール、トルマリン、ツァボライトガーネット） 1石ルース《複数購入割引有》
Sale price¥2,980
![[On sale November 3rd at 10pm] [Limited to 14 stones] One loose Russian oil-free emerald (2.1mm, square cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010751_b01a2802-d699-455c-a4e7-3df36f637eb8.jpg?v=1762075075&width=4000)
![[On sale from 10/18 at 10 PM] Limited to 10 stones: Greenland Ruby (2mm, with certificate from the mine owner) - Single loose stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010072_03ace85f-7297-4784-b894-a29098f147f9.jpg?v=1760749472&width=4000)
Solo (Simple Order Pendant Frame)
Sale price¥55,800
Sapphire from Madagascar 4.5mm/0.414ct loose
Sale price¥12,800
Sapphire from Madagascar 4.3mm/0.398ct loose
Sale price¥12,800
Hot Pink Spinel 0.203ct Loose (Mahenge Spinel)
Sale price¥8,800
Pink sapphire from Mozambique 0.213ct loose (hot pink sapphire)
Sale price¥9,800
Synthetic Moissanite 0.632ct loose stone (tie cut)
Sale price¥3,980
Synthetic Moissanite 0.509ct loose stone (tie cut)
Sale price¥3,980
Red beryl 0.173ct loose
Sale price¥29,800
Red beryl 0.136ct loose
Sale price¥25,800
Red beryl 0.131ct loose
Sale price¥19,800
Diamond 0.061ct loose (trapeze cut, VS class equivalent)
Sale price¥7,980
Diamond 0.042ct loose (trapeze cut, VS class equivalent)
Sale price¥6,980
Diamond 0.039ct loose (trapeze cut, equivalent to VS class)
Sale price¥5,980
Myanmar trapichel ruby 0.261ct rough stone
Sale price¥3,980
【11/10 22時販売】アメリカ産ノンオイルレッドベリル 0.060ctルース GIA
Sale price¥128,000
【11/10 22時販売】マダガスカル産シルキーピンクサファイア 1.050ctルース GIT
Sale price¥128,000
【11/10 22時販売】モザンビーク産ルビー 3.4mm/0.139ctルース
Sale price¥25,800
【11/9 22時販売】コロンビア産ノンオイルエメラルド 0.290ctルース GIA
Sale price¥188,000
【11/8 22時販売】《限定4石》カービングガチャ（ピンクトルマリン,平均3.4ct） 1石ルース《複数購入割引有》
Sale price¥3,980
Yellow sapphire from Madagascar 0.232ct loose
Sale price¥6,980
Yellow sapphire from Madagascar 0.207ct loose
Sale price¥6,980
Madagascar sapphire 0.205ct loose
Sale price¥7,980
[11/9 22:00 Sale] Ethiopian Sunstone 0.505ct Loose
Sale price¥8,800
[11/9 22:00 Sale] [Cat Cut] Thai Sapphire 5.255ct Loose
Sale price¥15,800
![[12560852] Russian Phenakite 0.899ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PB056853.jpg?v=1762867125&width=4000)
[12560852] Russian Phenakite 0.899ct Loose Stone
Sale price¥39,800
![[12560850] Russian Phenakite 0.520ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PB056757.jpg?v=1762867141&width=4000)
[12560850] Russian Phenakite 0.520ct Loose Stone
Sale price¥24,800
Green sapphire from Madagascar 0.199ct loose
Sale price¥6,980
Yellow sapphire from Madagascar 0.181ct loose
Sale price¥4,980
Ice blue sapphire from Madagascar 0.181ct loose
Sale price¥6,980
[Posted 12544254] Cornel pin 0.228ct loose
Sale price¥18,800
Brazilian bicolor tourmaline 1.764ct loose
Sale price¥32,800
Brazilian bicolor tourmaline 1.565ct loose
Sale price¥19,800
Tinker Bell Quartz (Pink Fire Quartz) 1.664ct Loose (Faceted Cut)
Sale price¥12,800
Brazilian blue tourmaline 0.376ct loose
Sale price¥7,980
Dendritic quartz 7.997ct loose
Sale price¥6,980
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.