All

Limited to 15 stones! Green Oregon Sunstone rough stone from the United States 💎 Average 1.5ct [Multiple purchase discounts available] Sale price¥5,980

Madeleine "Semi-custom ring setting" Sale price¥89,800

Limited to 6 stones: 1 Montebrasite stone from Madagascar (round cut, 4mm) Multiple purchase discounts available Sale price¥3,980

Limited to 11 stones: 1 rough kornerupine stone from Madagascar (average 8.5 carats) Multiple purchase discounts available Sale price¥2,980

Chinese color change fluorite 1 stone loose (7mm, round cut) {Multiple purchase discount available} Sale price¥2,580

Orion "Semi-custom pendant frame" Sale price¥59,800

TV anime "Shinkalion Change the World" x KARATZ collaboration Kuzuryu Ryota model Sale priceFrom ¥16,800

Limited to 8 pieces: 1 Nigerian Morganite loose stone (April birthstone, average 1 carat) Multiple purchase discounts available Sale price¥4,980

Limited to 9 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.5mm) Multiple purchase discounts available Sale price¥6,980

Limited Quantity: 1.5mm Pink Spinel from Myanmar (including Hot Pink Spinel) - Multiple Purchase Discounts Available Sale price¥2,580

Limited to 8 stones: Mexican Hyalite Opal Loose (Large 4ct, Fluorescent even in sunlight) Multiple purchase discounts available Sale price¥4,980

Limited to 9 stones: 1 loose Australian opal (faceted cut) [Multiple purchase discounts available] Sale price¥3,980

Limited Edition Synthetic Moissanite Gacha! 💎 Koshu Kiriko Plus Three Moissanite, Sange Cut, Pink, and Blue Moissanite Loose Stones Available. Multiple Purchase Discounts Available. Sale price¥4,980

Limited to 7 stones: One loose, oil-free Russian emerald (1.5-1.6mm, step cut) [Multiple purchase discounts available] Sale price¥5,980

Limited to 8 stones: 1 loose synthetic alexandrite (custom cut by Mr. Sanjay, shield cut, octagonal cut, etc.) Discounts available for multiple purchases Sale price¥6,980

Limited Edition of 12 Diamonds: VS Equivalent Fluorescent Diamond Gacha with Bonus Mini Slice Diamond (Multiple Purchase Discounts Available) Sale price¥6,980

Limited to 10 stones: Australian Opal Lottery with Certificate of Authenticity (including Australian Black Opal) (plus 1 Mexican Fire Opal) (Multiple purchase discounts available) Sale price¥6,980

《Limited to 13 stones, Tucson Arrivals》Kenya Bi-Color Grossular Garnet, usually ¥29,800, average 0.63ct. Tucson Arrivals 《Multiple Purchase Discount Available》 Sale price¥9,800

[On sale May 4th at 10 PM] Limited to 12 Stones - Loose Sri Lankan Star Sapphire (1 Stone) - Multiple Purchase Discount Available Sale price¥4,980

Brazilian alexandrite (average 0.12ct) loose (multiple purchase discount available) Sale price¥19,800

Lilium "Semi-custom pendant frame" Sale price¥59,800

Morganite 1 stone (oval cut, 5 x 7mm)《New birthstone for April》《Discount available for multiple purchases》 Sale price¥3,980

[Option] Laser engraving of characters and symbols Sale price¥4,000

shipping adjustment Sale price¥480

[Option] GIA certificate issuance fee Sale price¥15,000

Pyrope spessartine garnet (color change garnet) 1 stone loose (multiple purchase discount available) Sale price¥5,980

Additional fee: +20,000 yen Sale price¥20,000

Mille Sucre "Semi-custom ring setting" Sale price¥89,800

Limited to 6 stones: 1 loose, unheated silky pink sapphire from Vietnam (milky pink sapphire) Multiple purchase discounts available Sale price¥5,980

April birthstone Morganite rough stone and loose stone set of 2 (from Nigeria) {Multiple purchase discounts available} {For beginners} Sale price¥3,980

Limited to 18 stones: Myanmar spinel (3.5mm, pentagonal cut) 1 loose stone. Discounts available for multiple purchases. Sale price¥2,980

Limited to 9 sets: Sri Lankan sapphire (3.0-3.5mm, round cut) and Sri Lankan glass body set of 2 stones. Discounts available for multiple purchases. Sale price¥5,980

Nepalese Kyanite 1 stone loose (Royal Blue color, 4 x 6mm, oval cut) {Multiple purchase discount available} Sale price¥3,980

Limited to 6 stones: 1 loose pink spinel from Mahenge, Tanzania (round cut, 3.0mm) Discounts for multiple purchases Sale price¥6,980

Limited to 7 stones: 1 loose sphalerite stone from Spain (cabochon cut, 4.8-5.3mm) Multiple purchase discounts available Sale price¥3,980

Limited to 7 stones: 1 Tanzanian rhodolite garnet loose stone (polished by American polisher KEN) Multiple purchase discounts available Sale price¥3,980

Limited to 11 stones: Brazilian rhodonite in quartz (cabochon, 7.5-8.5mm) 1 loose stone. Discounts available for multiple purchases. Sale price¥2,980

Limited to 9 stones: 1 Brazilian Santa Maria aquamarine (round cut, approx. 3.2mm) Multiple purchase discounts available Sale price¥5,980

Officially Licensed Product: Limited Edition of 100: Yokohama DeNA BayStars Gold Mini Figure "DB.Starman" Available in Silver or 18K Gold Sale priceFrom ¥12,800

Limited to 14 stones: Brazilian dendritic quartz loose stone (average 7 carats) Multiple purchase discounts available Sale price¥2,980

[Sales End on Sunday, November 30th] Sebon Star Jewelry for Adults, No. 3 Heart Key Lock Pendant, Precious Model (Platinum/Gold) Pt950/K18YG/K18PG Sale price¥198,000

[Sales End on Sunday, November 30th] Sebonstar Jewelry for Adults, No. 3 Charmy Pact Ring, Precious Model (Platinum/Gold) Pt950/K18YG/K18PG Sale price¥198,000

Limited to 8 stones: Colombian mango quartz (up to 60 carats, average 21.6 carats) [Multiple purchase discounts available] Sale price¥1,980

[Sales start at 10 PM on Friday, December 12th] TV anime "Blue Lock" x KARATZ collaboration 2nd edition mark pendant top Sale price¥16,500

Limited to 7 stones: One loose colorless apatite from Madagascar (with appraisal certificate for each stone, average 0.60 carat) Discounts available for multiple purchases Sale price¥4,980

《Limited to 10 Stones》Beautiful Pink Brazilian Morganite Loose Stone 《Bulk Purchase Discount Available》 Sale price¥2,980

Limited to 9 stones! Includes Koshu Kiriko plus three citrine gacha, normally priced at 29,800 yen. Discounts available for multiple purchases. Sale price¥2,980

《Tucson Arrivals - Limited to 6 Stones》Brazilian Black Garden Quartz, Average 3.6ct《Bulk Purchase Discount Available》 Sale price¥6,980

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・Five Commitments

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.