5 major gems

Limited to 25 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases. Sale price¥4,980

Limited to 14 stones: Beryllium-heated sapphire (3.5mm, KEN cut) - 1 loose stone. Discounts available for multiple purchases. Sale price¥1,580

Limited to 18 stones: Mozambique ruby (princess cut, 2.3-2.5mm) Multiple purchase discounts available Sale price¥3,980

Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available Sale price¥4,980

[On sale March 7th at 10 PM] Limited to 10 stones: Madagascar pink sapphire (heart-shaped, including padparadscha color, approximately 3 x 2.3 mm) [Multiple purchase discounts available] Sale price¥2,980

Diamond loose sorting transition fee Sale price¥3,000

[Jeweler's Tools] Limited Edition Chelsea Color Filter Emerald 2-Piece Set Sale price¥6,980

Limited to 15 stones: One loose, unheated silky pink sapphire from Vietnam (2.5mm, round cut) [Multiple purchase discounts available] Sale price¥3,980

Limited to 14 stones: Lab-grown diamond (cabochon cut, approximately 2.3mm) - 1 loose stone. Discounts available for multiple purchases. Sale price¥4,980

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

[Available at 10 PM on February 22nd] Limited to 10 Opals - 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 6 stones: 1 loose, unheated silky pink sapphire from Vietnam (milky pink sapphire) Multiple purchase discounts available Sale price¥5,980

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

[Available at 10 PM on March 1st] Limited to 21 stones! Dominican Republic Conch Pearl & Shell Gacha Loose Stone (including one with a flame pattern) [Multiple purchase discounts available] Sale price¥3,980

Limited quantity: 1 impregnated ruby loose (4mm, round cut, identification instructions included) Multiple purchase discounts available Sale price¥1,980

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 11 stones: Sakura-shaped Contralus Opal and a specially cut Opal Gacha with one loose stone. Discounts available for multiple purchases. Sale price¥3,980

Limited to 12 stones: Mexican opal (custom faceted cut) - 1 loose stone (multiple purchase discounts available) Sale price¥3,980

[Available at 10 PM on February 22nd] Limited to 13 stones: Mexican Opal (Cabochon Cut) Gacha [Multiple purchase discounts available] Sale price¥2,980

[On sale March 28 at 10 PM] Tucson New Arrivals - Limited 18 pieces! 1 Peruvian Blue Opal stone (multi-item discount available) Sale price¥3,980

[On sale March 28th, 10 PM JST] Tucson Arrivals - Limited to 28 Stones - Andamooka Black Matrix Opal (Carbonized) from Australia - 1 Loose Stone - Multiple Purchase Discount Available Sale price¥3,980

Limited to 23 stones: Ethiopian Opal, 1 loose sphere (4.5-5.0mm) - Multiple purchase discounts available Sale price¥5,980

Top Quality: Benitoite 7 Stones and Diamond 6 Stones (H&C) Half Eternity Ring Set (2.0mm) Sale price¥178,000

Limited to 7 stones: 1 loose Australian iron opal (average 7ct, October birthstone opal) Multiple purchase discounts available Sale price¥4,980

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

Limited to 5 stones: 1 loose Madagascar sapphire (3mm, hexagonal cut) Multiple purchase discounts available Sale price¥3,980

Limited to 10 stones: 1 unheated yogo sapphire rough stone. Discounts available for multiple purchases. Sale price¥5,980

Limited to 8 stones: 1 Mexican fire opal loose stone with unique color (up to 2.2ct) Multiple purchase discounts available Sale price¥3,980

Kyanite from Nepal, 1 loose stone (indigo blue color, 4 x 6 mm, emerald cut) {Multiple purchase discount available} Sale price¥6,980

Limited to 14 stones: 3mm single unheated sapphire from the Theppanawa mine in Sri Lanka. Discounts available for multiple purchases. Sale price¥5,980

Mexican Hyalite Opal 2.592ct loose Sale price¥9,800

Limited to 12 stones Tanzanian Milky Opal Cat's Eye (7.5 x 5.5 mm) Multiple purchase discounts available Sale price¥3,980

Limited to 7 stones: 1 loose Australian boulder opal (average 25 carats) Multiple purchase discounts available Sale price¥8,800

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

Limited to 4 stones: 1 loose silky sapphire from Sri Lanka. Discounts available for multiple purchases. Sale price¥3,980

[Limited to 6 stones] Contains 2 stones in total: 1 gemstone (rough stone) that is actually featured in a gemstone encyclopedia + 1 emerald rough stone. Sale price¥4,980

Limited to 8 stones: 1 loose kite cut stone (illusion sunstone, sapphire, emerald, spessartine garnet, etc.) Multiple purchase discounts available Sale price¥5,980

[On Sale at 10 PM on January 11th] Mozambique Ruby 0.544ct Loose Stone with Certificate of Authenticity Sale price¥39,800

[Available at 10 PM on March 8th] [New Arrivals in Tucson - Limited to 13 Stones] Mexican Opals, including imperfect pieces (including egg-in and water opals) [Multiple purchase discounts available] Sale price¥2,980

[Option] Laser engraving of characters and symbols Sale price¥5,000

イエローダイヤモンド 0.190ctルース(FANCY DEEP ORANGY YELLOW, SI2) - KARATZ STORE｜カラッツSTORE

Yellow diamond 0.190ct loose (FANCY DEEP ORANGY YELLOW, SI2) Sale price¥39,800

Cantera opal 17.221ct loose Sale price¥25,800

Diamond 0.348ct loose (I, SI1) Sale price¥59,800

ピンクダイヤモンド 2.2mm/0.044ctルース(FANCY PURPLE PINK, I-1)

Pink diamond 2.2mm/0.044ct loose (FANCY PURPLE PINK, I-1) Sale price¥39,800

[Camellia cut] Opal 14mm/5.283ct loose with patch Sale price¥98,000

ピンクダイヤモンド（ラウンドカット） 0.060ctルース(VERY LIGHT BROWN PINK, I-2)

Pink diamond (round cut) 2.5mm/0.060ct loose (VERY LIGHT BROWN PINK, I-2) Sale price¥19,800

Twin Star Sapphire from Ratnapura, Sri Lanka 4.975ct loose stone (twin star sapphire) Sale price¥98,000

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.