NEWS
2025/07/02
New and updated on 6/25 (Wed)
【7/5 22時販売】シンシャ(シナバー)原石(38.1×28.8×22.4mm)
Sale price¥98,000
【7/5 22時販売】フォスフォフィライト原石(59.5×35.9×36mm)
Sale price¥298,000
[12557963] 0.715ct loose stone of Andalusite from Spain
Sale price¥69,800
[12557966] Brazilian pink tourmaline 0.638ct loose stone
Sale price¥39,800
[12557967] Yellow sapphire 0.839ct loose stone
Sale price¥59,800
[12557968] Synthetic Alexandrite 0.899ct loose stone
Sale price¥39,800
[12557974] 0.924ct loose pink sapphire from Ratnapura, Sri Lanka
Sale price¥98,000
[12558077] Benitoite 0.296ct loose stone
Sale price¥148,000
[12558086] Benitoite 0.158ct loose stone
Sale price¥59,800
Unheated blue sapphire from Madagascar, 1.310ct loose stone
Sale price¥89,800
[12559667] Sphene 0.531ct loose stone
Sale price¥8,800
[12559668] Sphene 0.556ct loose stone
Sale price¥9,800
[12559669] Sphene 0.602ct loose stone
Sale price¥9,800
[12559670] Sphene 1.079ct loose stone
Sale price¥19,800
[12559672] Bicolor sapphire 0.232ct loose stone
Sale price¥15,800
[12559671] Bicolor sapphire 0.188ct loose stone
Sale price¥12,800
【7/4 22時販売】ブラジル産バイカラートルマリン 13.927ctルース
Sale price¥198,000
【7/4 22時販売】トリフィライト(カラーチェンジタイプ) 0.467ctルース 鑑別書
Sale price¥49,800
【7/4 22時販売】イエローダイヤモンド(カボションカット) 0.176ctルース
Sale price¥29,800
【7/4 22時販売】イエローダイヤモンド(カボションカット) 0.324ctルース
Sale price¥39,800
【7/4 22時販売】イエローダイヤモンド(カボションカット) 0.237ctルース
Sale price¥35,800
【7/4 22時販売】トリフィライト(カラーチェンジタイプ) 0.168ctルース 鑑別書
Sale price¥15,800
[12558037] 9.860ct loose sphalerite from Spain
Sale price¥98,000
[12559678] Brazilian Imperial Topaz 1.726ct Loose
Sale price¥59,800
[12559675] Zimbabwe bicolor euclase 0.192ct loose stone
Sale price¥39,800
[12559674] Zimbabwe bicolor euclase 0.108ct loose stone
Sale price¥22,800
[12558987] Padparadscha sapphire 0.227ct loose stone
Sale price¥29,800
[12559673] Bicolor sapphire 0.301ct loose stone
Sale price¥18,800
KARATZ collaboration
List of new arrivals
【6/28 22時販売】《限定6石》モザンビーク産カナリーイエロートルマリン1石ルース《複数購入割引有》
Sale price¥6,980
【6/27 22時販売】フィンランド産ラブラドライト 62.409ctルース(スペクトロライト)
Sale price¥19,800
【6/26 22時販売】コロンビア産トラピッチェエメラルド(逆トラピッチェ) 0.178ct原石
Sale price¥15,800
【6/26 22時販売】グリーンランド産ピンクサファイア(アイスルビー) 3.5mm/ 0.217ctルース 証明書付
Sale price¥12,800
[On sale at 22:00 on 6/23] Sri Lankan ekanite 0.830ct loose stone
Sale price¥18,800
[On sale at 10pm on 6/22] Madagascar Pezzottaite 0.257ct loose stone
Sale price¥15,800
[12559693] Myanmar red spinel 0.165ct loose stone
Sale price¥9,800
[12559691] Myanmar red spinel 0.182ct loose stone
Sale price¥8,800
[12559690] Brazilian chlorite in quartz 27.725ct loose stone
Sale price¥19,800
[12559689] Apatite 1.125ct loose stone
Sale price¥8,800
[12559688] Brazilian bicolor tourmaline 1.032ct loose stone
Sale price¥25,800
[12559687] Madagascar Apatite 0.961ct Loose Stone
Sale price¥6,980
[12559686] 1.835ct Oregon Sunstone loose stone from the United States
Sale price¥22,800
[12559685] Brazilian bicolor tourmaline 1.875ct loose stone
Sale price¥39,800
[12559683] Brazilian pink tourmaline 0.781ct loose stone
Sale price¥9,800
[12559682] Brazilian pink tourmaline 0.918ct loose stone
Sale price¥9,800
[12559681] Brazilian pink tourmaline 1.045ct loose stone
Sale price¥9,800
[12559680] Mexican fire opal 1.348ct loose stone
Sale price¥15,800
[On sale at 22:00 on 6/25] Tanzanian dragon garnet 0.713ct loose stone
Sale price¥15,800
[On sale at 22:00 on 6/25] Colombian Euclase 0.817ct loose stone
Sale price¥29,800
[On sale at 22:00 on 6/25] Colombian Euclase 1.344ct loose stone
Sale price¥26,800
[On sale at 10pm on 6/22] Colombian Euclase 0.735ct loose stone
Sale price¥14,800
[On sale at 22:00 on 6/23] Colombian Euclase 1.776ct loose stone
Sale price¥15,800
jewelry
Limited Quantity: K18 Yellow Gold Kihei Chain Necklace 1.0mm/1.6g [40cm]
Sale price¥26,800
[Colorful] K18WG Brown Diamond Ring
Sale price¥69,800
K18YG Afghan Kunzite 0.74ct, Tanzanite, Sapphire Ring
Sale price¥79,800
Pt900 Tanzanian Malaya Garnet 2.01ct Diamond Pendant (Necklace)
Sale price¥59,800
Pt900 Kashmir unheated sapphire 1.14ct / diamond 0.70ct ring GIA
Sale price¥1,580,000
Pt900/Pt850 Australian Black Opal 0.37ct Diamond 0.73ct Necklace
Sale price¥198,000
K18YG Brazilian Paraiba Tourmaline 0.30ct Diamond Ring GIA
Sale price¥198,000
K18PG Sri Lankan Yellow Sapphire 0.31ct Green Garnet Ring
Sale price¥89,800
K18YG Sri Lankan chrysoberyl cat's eye 0.69ct chrysoprase ring
Sale price¥79,800
K18 sea blue chalcedony earrings
Sale price¥25,800
[Published in 22602357] K18 mint garnet 0.513ct ring
Sale price¥79,800
Pt950 Brazilian Paraiba Tourmaline Ring (Fluid Setting, Oval Cut)
Sale price¥64,800
Brazilian Paraiba Tourmaline Ring and Half Eternity Ring Set (1.2mm)
Sale price¥188,000
K18YG American Turquoise 1.04ct Ring (Cat Cut)
Sale price¥79,800
Pt950 Diamond (Cabochon Cut) 0.131ct Ring
Sale price¥158,000
K18PG Brazilian Paraiba Tourmaline 0.286ct Grandidierite Ring GIA
Sale price¥198,000
K18/Pt950 Afghanistan Green Apatite 0.162ct Ring
Sale price¥198,000
[Dandelion Cut] K18PG Yellow Sapphire 1.927 Ring Japanese-German Edition
Sale price¥298,000
K18 Orange Sapphire 1.980ct Pink Diamond Ring DGL Appraisal
Sale price¥198,000
Pt900 Brazilian Alexandrite 0.14ct Pendant (Necklace)
Sale price¥79,800
SV925 Silver Chain 0.7mm/1.1mm [40cm]
Sale priceFrom ¥1,580
Pt900 Benitoite (Ice Blue) 0.17ct Pink Diamond Ring
Sale price¥148,000
《Products eligible for multiple purchase discount》
【6/28 22時販売】《限定6石》モザンビーク産カナリーイエロートルマリン1石ルース《複数購入割引有》
Sale price¥6,980
Custom-made with a choice of stones
Items under 10,000 yen
【6/28 22時販売】《限定6石》モザンビーク産カナリーイエロートルマリン1石ルース《複数購入割引有》
Sale price¥6,980
[12559693] Myanmar red spinel 0.165ct loose stone
Sale price¥9,800
[12559691] Myanmar red spinel 0.182ct loose stone
Sale price¥8,800
[12559689] Apatite 1.125ct loose stone
Sale price¥8,800
[12559687] Madagascar Apatite 0.961ct Loose Stone
Sale price¥6,980
[12559683] Brazilian pink tourmaline 0.781ct loose stone
Sale price¥9,800
[12559682] Brazilian pink tourmaline 0.918ct loose stone
Sale price¥9,800
[12559681] Brazilian pink tourmaline 1.045ct loose stone
Sale price¥9,800
[On sale at 22:00 on 6/24] Brazilian Morganite 0.405ct loose stone
Sale price¥7,980
[On sale at 10pm on 6/22] Brazilian Swiss Blue Topaz 0.957ct Loose
Sale price¥8,800
Brazilian Swiss Blue Topaz 0.827ct Loose Stone
Sale price¥8,800
[On sale at 22:00 on 6/24] Brazilian Swiss Blue Topaz 0.889ct Loose
Sale price¥8,800
Brazilian Swiss Blue Topaz 0.890ct Loose
Sale price¥8,800
[On sale at 10pm on 6/22] Brazilian Swiss Blue Topaz 1.193ct Loose
Sale price¥9,800
Brazilian Swiss Blue Topaz 1.042ct Loose Stone
Sale price¥9,800
Brazilian Swiss Blue Topaz 0.983ct Loose Stone
Sale price¥8,800
Brazilian Swiss Blue Topaz 0.724ct Loose Stone
Sale price¥8,800
[On sale at 10pm on 6/22] Brazilian Swiss Blue Topaz 1.043ct Loose
Sale price¥8,800
[On sale at 22:00 on 6/23] Brazilian Blue Topaz 1.355ct Loose
Sale price¥8,800
[On sale at 10pm on 6/22] Brazilian Blue Topaz 0.766ct Loose
Sale price¥6,980
[On sale at 22:00 on 6/10] Mexican fire opal 0.448ct loose stone
Sale price¥3,980
[On sale at 22:00 on 6/26] Ethiopian Sunstone 0.661ct Loose
Sale price¥9,800
[6/7 22:00 Sale] Ethiopian Opal 7.2mm/0.910ct Loose Stone
Sale price¥6,980
[On sale at 22:00 on 6/4] Namibian Jeremejevite 0.055ct loose stone
Sale price¥5,980
jeweler's tools
[Jeweler's Tools] Color change penlight loose set
Sale price¥4,980
[Jeweler's Tools] Digital Caliper Color Shift Amethyst 2 Piece Set
Sale price¥2,980
[Jeweler's Tools] White penlight (for loose), loose 3-piece set
Sale price¥5,980
Jeweler's tool "plate light"
Sale price¥3,800

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 publishes "Gemstone Encyclopedia"
The book provides explanations about over 300 types of gemstones, from new standard birthstones to rare stones that are hard to find, as well as a diary of our company representative, Mr. Koyama's, gemstone shopping experience in Thailand and Sri Lanka, and tips for photographing gemstones, allowing you to learn about the appeal of gemstones from various perspectives.