New stock

Watermelon tourmaline 6.575ct rough stone Sale price¥9,800

Brazilian Alexandrite 0.062ct loose stone (princess cut) Sale price¥15,800

Brazilian Alexandrite 0.068ct loose stone (princess cut) Sale price¥17,800

Brazilian Alexandrite 0.093ct loose stone (princess cut) Sale price¥25,800

Brazilian Alexandrite 0.069ct loose stone (princess cut) Sale price¥17,800

Brazilian Alexandrite 0.068ct loose stone (princess cut) Sale price¥17,800

Brazilian Alexandrite 0.072ct loose stone (princess cut) Sale price¥18,800

【KEN氏】ブラジル産アメジスト 5mm/0.390ctルース（セミオーダーメイドセット）

[Staff Selection] [Mr. KEN] Brazilian Amethyst 5mm/0.390ct Loose Stone (Semi-Custom Made Set) Sale price¥47,800

Paraiba Tourmaline from Mozambique 0.512ct loose stone Sale price¥25,800

Russian Diamond Rough (Sawable) 0.097ct Loose (Trigon) Sale price¥25,800

【クローバーインカット】ルードヴィッヒアイトインペリドット 7mm/1.20ctルース《コラボ》　ワッペン

[Clover in cut] Ludwigite in Peridot 7mm/1.20ct loose stone {Collaboration} Patch Sale price¥32,800

【さくらインカット】ボリビア産アメトリン 8mm/1.497ctルース《コラボ》ワッペン

[Sakura Incut] Brazilian Ametrine 8mm/1.497ct Loose Stone [Collaboration] Patch Sale price¥22,800

[Sakura Incut] Amethyst 14mm/7.703ct Loose Patch Sale price¥29,800

【甲州貴石切子pluesthree】合成モアッサナイト 10mm/4.198ctルースワッペン

[Koshu Precious Stone Cutting Plusthree] Synthetic Moissanite 10mm/4.198ct Loose Patch Sale price¥69,800

【カメリアカット】オレゴンサンストーン 2.102ct《コラボ》ルース　ワッペン

[Camellia Cut] Oregon Sunstone 14mm/2.102ct {Collaboration} Loose Patch Sale price¥79,800

[Confetti Cut] Color Shift Amethyst 3.499ct Loose Stone Sale price¥22,800

Greenland Tugtupite 0.140ct loose stone Sale price¥15,800

Greenland Tugtupite 0.642ct loose stone Sale price¥25,800

Greenland Tugtupite 0.546ct loose stone Sale price¥29,800

イエローダイヤモンド 4mm/0.261ctルース(LIGHT YELLOW, VS-2, VeryGood)（セミオーダーメイドセット）

[Staff Selection] Yellow Diamond 4mm/0.261ct Loose (LIGHT YELLOW, VS-2, Very Good) (Semi-Custom Made Set) Sale price¥59,800

American oil-free red beryl 0.060ct loose GIA Sale price¥118,000

Non-Oil Emerald 0.564ct Loose Stone by Nikkei Sale price¥398,000

Hot pink spinel, rose quartz, Santa Maria aquamarine, and amethyst 13-stone half eternity ring set (2.0mm) Sale price¥69,800

Paraiba tourmaline, pink sapphire, opal, pink spinel 13 stone half eternity ring set (2.0mm) Sale price¥98,000

Unheated Padparadscha Sapphire from Madagascar 3.5mm/0.190ct Loose GIA Sale price¥39,800

Limited to 9 stones Fluorescent diamond gacha (VS-SI class, 2.5-2.7mm) (1 in 3 will be an additional fluorescent diamond) Multiple purchase discount available Sale price¥6,980

Limited to 6 stones: 1 loose Mahenge spinel stone from Tanzania (Papara color) Multiple purchase discounts available Sale price¥3,980

Brazilian Green Tourmaline 12.252ct Loose Stone Sale price¥398,000

Colombian pyrite in emerald 6.415ct loose stone Sale price¥298,000

Amazon Green Opal 1.372ct Loose (Faceted Cut) Sale price¥8,800

Amazonian green opal 1.814ct loose stone (faceted cut) Sale price¥9,800

Amazon Green Opal 1.057ct Loose (Faceted) Sale price¥8,800

Amazon Green Opal 0.781ct Loose (Faceted Cut) Sale price¥7,980

Amazon Green Opal 0.630ct Loose (Faceted Cut) Sale price¥8,800

【スタッフセレクション】スピネル 0.658ctルース（セミオーダーメイドセット）

[Staff Selection] [Mr. KEN] Myanmar Spinel 0.658ct Loose (Semi-Custom Made Set) Sale price¥49,800

Pigeon Blood Ruby 0.320ct Loose AIGS Sale price¥69,800

[On sale from 10/25 at 10pm] Pigeon Blood Ruby 0.220ct Loose AIGS Sale price¥45,800

Royal Blue Sapphire 1.182ct Loose (Calfshead) AIGS Sale price¥98,000

Colombian oil-free emerald 0.290ct loose stone GIA Sale price¥198,000

モザンビーク産エルバイトトルマリン 1.371ctルース（CuO:0.2%,MnO:2.6%）

[On sale at 10pm on 10/25] Elbaite tourmaline from Mozambique, 1.371ct loose stone (CuO: 0.2%, MnO: 2.6%) Sale price¥59,800

《Yurakucho Marui 2024112 Carry-out》Conch pearl (with flame pattern) 0.732ct loose Sale price¥15,800

ブラジル産パライバトルマリン 0.233ctルース（CuO:1.6％.MnO:2.4％）

《Yurakucho Marui 2024112 takeout》Brazilian Paraiba tourmaline 0.233ct loose stone (CuO: 1.6%, MnO: 2.4%) Sale price¥358,000

Cornflower Blue Sapphire 0.230ct Loose AIGS Sale price¥45,800

Purple spinel 0.955ct loose stone Sale price¥19,800

[Mr. KEN] Myanmar pink spinel 1.165ct loose stone Sale price¥19,800

Tanzania UV type mint garnet 0.260ct loose stone Sale price¥6,980

Paraiba tourmaline from Brazil 0.154ct loose Sale price¥29,800

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.

The fifth reprint has been decided and is now on sale at bookstores nationwide and online.

Written by KARATZ, book “Jewelry Illustrated Book”

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.

KARATZ・Five Commitments