New & Updated on Thursday, July 30th
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_f4ce5d64-8804-46cd-8a67-6e5dfa2be8a9.png?v=1785924412&width=4000)
![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_d85e6b2e-52be-4e3d-9b49-b7afa91b3f4d.png?v=1785987595&width=4000)
![[On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*](http://store.karatz.jp/cdn/shop/files/collage_07f6900d-fa8d-4bc4-acda-dc4cf0e8fed7.png?v=1785923452&width=4000)
![[On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*](http://store.karatz.jp/cdn/shop/files/collage_ee8309d3-5bb0-4cb8-b162-fd9ce98dae4e.png?v=1785924238&width=4000)
![[Lottery Sale 0629_08] Colombian Non-Oil Emerald 4.1mm/0.240ct Loose GIA](http://store.karatz.jp/cdn/shop/files/P6252043_bf7ba352-8708-4d76-a722-35fa2d8c1db4.jpg?v=1785129469&width=2995)
[Lottery Sale 0629_08] Colombian Non-Oil Emerald 4.1mm/0.240ct Loose GIA
Sale price¥458,000
[Star in cut] Mexican fire opal 7mm/0.678ct loose patch
Sale price¥39,800
![[#202607 Akihabara Pop-up Store Takeout][Shinjuku Marui Annex 202605 Takeout][12548265 Listed] Padparadscha Sapphire 0.545ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1010826.jpg?v=1779787158&width=4000)
【Sakura Shape】Synthetic Sapphire 8.8mm/3.631ct Loose Stone
Sale price¥39,800
【12563920 Listed】Mexican Cantera Opal 5.085ct Loose Stone
Sale price¥25,800
![[Item 12563910] Colombian Pyrite and Mica in Emerald, 0.360 ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7290366_a3237ea2-6055-4b43-b11b-dd917b10263d.jpg?v=1785733290&width=3063)
1.008ct Tanzanian orange zircon loose stone
Sale price¥9,800
Russian Alexandrite 2.8mm/0.111ct Loose Stone
Sale price¥69,800
Sri Lankan zircon 2.307ct loose
Sale price¥12,800
German Awinite 0.070ct loose stone
Sale price¥15,800
0.175 ct loose benitoite from the USA, with certificate
Sale price¥128,000
[Mr. Takeshi Yamamoto] Rock crystal 43.123ct loose
Sale price¥25,800
Pink sapphire 0.225ct loose
Sale price¥6,980
![[Listed as 22602699] [COLORFUL] K18 Blue Sapphire 1.13ct Ring](http://store.karatz.jp/cdn/shop/files/P8030007.jpg?v=1785805373&width=4000)
[Listed as 22602699] [COLORFUL] K18 Blue Sapphire 1.13ct Ring
Sale price¥188,000
![[Listed as 22602700] [Colorfully] Pt900 Pink Sapphire 0.465ct Ring](http://store.karatz.jp/cdn/shop/files/P8030041_fac43cf4-cf9f-4049-8e4d-6fe5f7bfc4ec.jpg?v=1785837026&width=4000)
[Listed as 22602700] [Colorfully] Pt900 Pink Sapphire 0.465ct Ring
Sale price¥59,800
![[22602697 listed] [Colorfury] Pt850 Ruby 0.85ct Ring](http://store.karatz.jp/cdn/shop/files/P8039890_4fd308f6-1a50-4c81-88ba-05a42b4d57d1.jpg?v=1785837260&width=4000)
[22602697 listed] [Colorfury] Pt850 Ruby 0.85ct Ring
Sale price¥79,800
![【#202607 Akihabara Pop-up Store - Currently Removed for Display】[Colorfuri] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate](http://store.karatz.jp/cdn/shop/files/P4085602_239fb724-e8c8-4f49-8fab-65e692522cdb.jpg?v=1785992300&width=4000)
![[#202607 Akihabara Pop-up Store Carry Out] [12559782 Listed] Hackmanite 0.142ct Loose](http://store.karatz.jp/cdn/shop/files/P1232156_389dcec5-a0ea-4f2e-bd25-4c62be6e4efe.jpg?v=1785991343&width=2896)
![[#202607 Akihabara Pop-up Store Takeout in Progress] [12559784 Posted] Hackmanite 0.110ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1232213_d7cd223f-229c-4425-a8c1-014ed7e1a07f.jpg?v=1785991541&width=3204)
![[#202607 Akihabara Pop-up Store - Currently Removed] [12559462 Listed] Nigerian Mandarin Garnet 1.347ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/20260201_P2058585_56dee4ab-dd12-43c3-8ad9-e665d17df5b6.jpg?v=1785991614&width=2979)
![[#202607 Akihabara Pop-up Store - Currently Removed] [Shinjuku Marui Annex 202605 - Currently Removed] [12559525 Listed] Synthetic Alexandrite 1.409ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_94526321-060b-48fd-958e-7b5c1d019ef0.png?v=1785991851&width=4000)
![[#202607 Akihabara Pop-up, Currently Off-site] [12563253 Posted] Afghan Hauyne 0.112ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P6122062_5340f701-68a5-406b-a2f9-4371047fb8c6.jpg?v=1785992740&width=2443)
![[#202607AkihabaraPopUpOnLoan][12563137 Listed] Brazilian Santa Maria Aquamarine 0.264ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P6100440_803c0906-57b6-4ef1-bcde-aaa1e00ccd11.jpg?v=1785993081&width=2248)
![[Listed on 12563962] Madagascar Padparadscha Sapphire 0.314 ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7242073_bb1c6b45-7eec-4946-b9ae-cf987da714ae.jpg?v=1785731541&width=3012)
[Posted on 12563934] Colombian Emerald 0.792ct Loose Stone
Sale price¥39,800
![[Published 12563933] Brazilian Rubellite 1.100ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7313058_04b1c2a1-4e5e-48af-bd45-7d19df69c5ff.jpg?v=1785731873&width=2695)
[Published 12563933] Brazilian Rubellite 1.100ct Loose Stone
Sale price¥98,000
![[Listing 12563881] Green Afghan Hauyne 0.086ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P7312744_1c1b39ec-607e-4f45-a6a3-ea7ff65c4c2b.jpg?v=1785732410&width=2448)
[Listing 12563881] Green Afghan Hauyne 0.086ct Loose Stone
Sale price¥22,800
List of new arrivals
[Published 12563933] Brazilian Rubellite 1.100ct Loose Stone
Sale price¥98,000
Brazilian rhodonite 1.423ct loose stone
Sale price¥29,800
[Listed on 12562258] Eudialyte from Canada 2.796 ct loose stone
Sale price¥39,800
【8/2 22時販売】ジンバブエ産バイカラーユークレース 0.066ctルース
Sale price¥12,800
【8/2 22時販売】ジンバブエ産バイカラーユークレース 0.081ctルース
Sale price¥14,800
【8/2 22時販売】ジンバブエ産バイカラーユークレース 0.058ctルース
Sale price¥8,800
【8/2 22時販売】スイートホーム産ロードクロサイト 0.100ctルース 鑑別書
Sale price¥8,800
[12563993] Cambodian Blue Zircon 3.546ct Loose
Sale price¥69,800
【8/1 22時販売載】【カラフリ】Pt850 ベネチアンチェーン ネックレス 約45cm スライドチェーン
Sale price¥39,800
[22602674 Listed] [Karafuri] Pt900 Burma Ruby 1.07ct Ring
Sale price¥258,000
[Posted as 12563944] Colombian Trapiche Emerald 0.252ct Loose Stone
Sale price¥35,800
[Listed as 12563943] Colombian Trapiche Emerald 0.231ct Loose Gemstone
Sale price¥33,800
[Listed as 12563891] Namibian Jeremejevite 0.089ct Loose
Sale price¥22,800
[Listed in 12564013] Madagascar Blue Sapphire 0.662ct Loose
Sale price¥18,800
[Listed as 12563997] 0.107ct Colombian Emerald Loose Stone
Sale price¥12,800
[Posted on 12563995] Australian Black Opal 0.702 ct Loose Stone
Sale price¥29,800
[Lottery Sale 0521_08] Madagascar Sapphire 1.650ct Loose GIA
Sale price¥158,000
[Published in 22602657] [Colorful] Pt900 Akoya Pearl Ring
Sale price¥98,000
[On sale July 26th at 10 PM] Nepali Kyanite 2.461ct Loose Stone
Sale price¥12,800
![[On sale from 12:00 PM on Thursday, July 30] Adult Sebonstar 4th Edition "Swan Tiara Pendant" Precious Model Pt950](http://store.karatz.jp/cdn/shop/files/P6123128_3009407b-a599-4597-a2ae-85e266a3858f.jpg?v=1784876515&width=4000)
![[On Sale 12 PM JST on Thursday, July 30] Adult Sebonstar Vol. 4 "Swan Tiara Pendant" Silver Model (Silver Color) SV925 & Rhodium Plating](http://store.karatz.jp/cdn/shop/files/P6123128.jpg?v=1784874779&width=4000)
[Listed as 12562727] Pink Imperial Topaz 1.907ct Loose Stone
Sale price¥118,000
[Posted as 12562691] Malawi Bicolor Zircon 2.082ct Loose
Sale price¥128,000
[Sales begin 7/31 10 PM JST] [Colorflee] K18WG Diamond 0.30ct Earrings
Sale price¥29,800
《Products eligible for multiple purchase discount》
![[Sale starts July 7 at 10 PM] Limited to 14 Stones: Special Cut Gacha [Bulk Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/75.png?v=1785113154&width=2268)
![[On sale August 1 at 10 PM] Limited 10 Stones: Sapphire Gacha (including unheated cornflower blue sapphires, normally ¥69,800), with a bonus Sange sapphire. Multiple purchase discount available.](http://store.karatz.jp/cdn/shop/files/79.png?v=1785150857&width=4000)
![[On Sale July 31st at 10 PM] "Limited to 20 Stones" Indigo Tourmaline Gacha with 5 Gem-Quality Stones + 1 Loose Stone (Certificate Included) (Multiple Purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/80.png?v=1785152112&width=4000)
![[Sale on July 7th at 10 PM] Limited to 12 stones! Blue Gem Gacha [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/77_ede25372-0894-4b5d-ac9c-3b1ca2b56c4f.png?v=1785146266&width=4000)
![[Limited to 24 stones] Oregon Sunstone from America with beautiful Schiller (Oval cut, 5 x 7mm) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/collage_50cccb1a-7282-4487-ae6d-b6447e9885ee.png?v=1785119892&width=3000)
![[Limited to 16 Stones] Yellow Diamond Gacha including Sorting [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/64.png?v=1783912782&width=2268)
![[Sale starts 10PM on July 12] Limited 20 Stones: Grandidierite Single Stone Loose (Avg. 0.035ct) from Madagascar [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/P1010194_ea02faf6-d812-4758-9e0c-262e6891b700.jpg?v=1783773075&width=4000)
![[Sale on 7/ at 10 PM] "Limited to 13 Stones" Madagascar Sapphirine, average 0.09ct "Multiple Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/P1010288_ec4000a1-014e-44e1-9b97-40f834b9e6e7.jpg?v=1783494963&width=4000)
![[On sale July 24 at 10 PM] Limited to 5 stones: Andesine-Labradorite (Rainbow Moonstone) from Balangoda, Sri Lanka (Pear Shape Buff Top Cut, 5.0x3.0mm) - 1 Loose Stone (Multi-purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_81278a10-2271-47ca-aa76-74cf03ec312c.png?v=1784701906&width=3000)
![[On sale July 24 at 10 PM] Limited to 5 stones: Moonstone from Madiyagoda, Sri Lanka (June birthstone, oval buff top cut, 5.0x4.0mm), 1 loose stone. (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/collage_0c9ec17a-a7f0-41f2-8f40-1dca2677abfc.png?v=1784701731&width=3000)
![[Sales begin July 24 at 10 PM] Limited 5 Stones: Moonstone from Mitiyagoda, Sri Lanka (June Birthstone, Round Buff-Top Cut, 4.0mm) - 1 Loose Stone [Multiple Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/collage_f0bd4330-0217-47fd-88f4-e6604c1c4eae.png?v=1784701179&width=3000)
![[Sale starts July 20, 10 PM JST] Limited to 9 Stones: Opal Gacha, including Black Opal (plus a free Fire Opal!) (Multiple purchase discount available)](http://store.karatz.jp/cdn/shop/files/2026-07-207.47.29.png?v=1784501274&width=1270)
![[On sale July 19th at 10 PM] Limited to 12 Stones: Spanish Sphalerite Gacha Single Stone Loose Gemstone [Multi-purchase discount available]](http://store.karatz.jp/cdn/shop/files/P1010752_356462ac-3c50-4157-9518-627c0d99e74f.jpg?v=1784278877&width=4000)
![[On sale July 20th at 10 PM] "Limited to 13 Stones" Diamond Gacha: Win a FANCY VIVID Yellow Diamond (with sorting report) worth 22,800 yen. One loose stone. (Multiple purchase discount available.)](http://store.karatz.jp/cdn/shop/files/69_1dc952cf-a5b9-4240-ac75-53420ad95011.png?v=1784277381&width=4000)
![[On sale July 20th at 10 PM JST] Tanzanian Pink Spinel (approx. 3x4mm, oval cut) - Limited to 12 stones. Multiple purchase discount available.](http://store.karatz.jp/cdn/shop/files/P1010256_aecf3805-de02-4de7-aa94-5e5208ca43d2.jpg?v=1783911756&width=4000)
![[On sale July 19 at 10 PM] Limited 12 Pieces: Pakistan Vayrynenite Gacha 1 Piece Loose Stone (Average 0.03ct) - Bulk Purchase Discount Available](http://store.karatz.jp/cdn/shop/files/P1010096_1_deb38e99-0510-49f1-a287-af84015fa7ce.jpg?v=1784208408&width=4000)
![[7/18 10 PM JST Release] Windsor Sapphire Gacha (1 of 14 Limited Stones) (Bicolor, Silky, Color Change, Avg. 0.30ct) (Multi-purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/collage_52e4b5c0-2a5f-4509-9176-abffa097c791.png?v=1784246994&width=3000)
![[On sale July 12th at 10 PM] "Limited to 15 Stones" All stones with GIA certificate. Madagascar Grandidierite 1 stone loose (average 0.065ct) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_efaaa09c-4887-4d33-aeac-cd0ee5d3debd.png?v=1783774249&width=3000)
![[On sale July 10 at 10 PM] Limited 8 stones: Sweet Home Mine rhodochrosite single loose stone (average 0.1 ct) [Multiple purchase discount available]](http://store.karatz.jp/cdn/shop/files/P1010384_a9c123c1-c332-47e6-895c-2e2eaf77e8e0.jpg?v=1783557558&width=4000)
![[Available July 15 at 10 PM] Limited to 6 Stones: Rainbow Aquamarine Single Stone Loose (average 0.7ct) [Multi-Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/collage_5dff6ef8-31bd-43db-abb0-1573e37d6311.png?v=1783918927&width=3000)
![[On sale July 10th at 10 PM] Veatchite, Pakistan, Loose Stone (Avg. 0.04ct) - Limited to 23 Stones - Multiple Purchase Discount Available](http://store.karatz.jp/cdn/shop/files/P1010202_922f35b0-bb64-48b1-8b5c-0d9c3bd450c7.jpg?v=1783493089&width=4000)
![[Sales start July 11th, 10 PM JST] 《Limited to 11 stones》 Madagascar Apatite Single Stone Loose (UV fluorescent type, average 1.0ct) 《Bulk purchase discount available》](http://store.karatz.jp/cdn/shop/files/collage_9ebca466-92b9-498e-9068-a39188c70a00.png?v=1783678634&width=3000)
![[7/ 22:00 JST Release] Indian Green Phantom Quartz (Multiple Purchase Discount Available)](http://store.karatz.jp/cdn/shop/files/collage_c7b9ee75-56b2-4af7-baca-447dbced5e6a.png?v=1783296264&width=3000)
Bungo and Alchemist
【8/1 22時販売載】【カラフリ】Pt850 ベネチアンチェーン ネックレス 約45cm スライドチェーン
Sale price¥39,800
[22602674 Listed] [Karafuri] Pt900 Burma Ruby 1.07ct Ring
Sale price¥258,000
[Published in 22602657] [Colorful] Pt900 Akoya Pearl Ring
Sale price¥98,000
[Sales begin 7/31 10 PM JST] [Colorflee] K18WG Diamond 0.30ct Earrings
Sale price¥29,800
[22602668 listed] [Colorful] K18 Tanzanite 0.25ct Ring
Sale price¥79,800
[22602667 Posted] [Colorful] Pt900 Hauyne 0.035ct Ring
Sale price¥89,800
[22602626 listed] [Kalafr] K18 Grossular Garnet 0.26ct Charm
Sale price¥39,800
[Published on 22602652] [Colorful] K18 Synthetic Opal Pendant Top
Sale price¥19,800
[Listed as 22602651] [Colorful] K9 Ruby Pendant Top (Necklace Top)
Sale price¥19,800
[22602646 listed] [Karafuri] Pt850 Blue Sapphire 0.66ct Ring
Sale price¥59,800
Search by category
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 publishes "Gemstone Encyclopedia"
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.