Birthstone list

Untreated Brazilian green tourmaline, 0.456 ct, loose (teal color) Sale price¥13,800

Bicolor Grossular Garnet from Kenya (Bicolor Tsavorite) 0.496ct Loose Sale price¥14,800

Bicolor Grossular Garnet (Bicolor Tsavorite) from Kenya, 0.761 ct, Loose Sale price¥22,800

【12562577掲載】ケニア産バイカラーグロッシュラーガーネット 0.790ctルース

Bi-color grossular garnet (bi-color tsavorite) from Kenya, 0.790 ct loose stone Sale price¥24,800

【12562507掲載】スリランカ産非加熱スターサファイア 0.961ctルース

Untreated Sri Lankan Star Sapphire 0.961ct Loose Stone Sale price¥11,800

[On sale May 11, 10 PM JST] Unheated Sri Lankan Star Sapphire 0.737ct Loose Stone Sale price¥9,800

[On sale May 10, 10 PM JST] Unheated Sri Lankan Star Sapphire 0.710ct Loose Stone Sale price¥8,800

[Sales start 10 PM, May 6] Unheated Sri Lankan Star Sapphire 0.618ct Loose Stone Sale price¥9,800

【Sales start at 10 PM on May 6th】Unheated Sri Lankan Star Sapphire 0.523ct Loose Stone Sale price¥9,800

【12562516掲載】スリランカ産非加熱スターサファイア 0.499ctルース

Unheated Sri Lankan star sapphire 3.9mm/0.499ct loose gemstone Sale price¥8,800

Colombian emerald with pyrite 0.248ct rough stone Sale price¥12,800

0.517ct loose blue sapphire from Sri Lanka Sale price¥18,800

[On sale May 6th at 10 PM] Sri Lankan Bi-Color Sapphire 0.442ct Loose Gemstone Sale price¥15,800

Peruvian Bicolor Blue Opal 4.379 ct Loose Gemstone Sale price¥6,980

0.345ct Loose Blue Sapphire from Sri Lanka Sale price¥12,800

0.442ct Loose Blue Sapphire from Sri Lanka Sale price¥22,800

[On sale May 5th at 10 PM JST] Madagascar Blue Sapphire 0.413ct Loose Gemstone Sale price¥15,800

Tanzanian Rhodolite Garnet 0.609ct Loose Gemstone Sale price¥8,800

Brazilian Aventurine Aquamarine 4.2mm/0.239ct Loose Stone Sale price¥8,800

0.455ct Loose Madagascar Blue Sapphire Sale price¥25,800

0.329ct Loose Blue Sapphire from Sri Lanka Sale price¥15,800

Loose 0.485 ct Sri Lankan Blue Sapphire Sale price¥9,800

0.354ct Unheated Star Sapphire Loose Stone from Sri Lanka Sale price¥6,980

Sri Lankan Unheated Star Sapphire 0.238ct Loose Sale price¥3,980

Pt900/Pt850クリノヒューマイト0.726ct ペンダント（ネックレス） - カラッツSTORE

[Color Fleuri] Pt900 Chondrodite 0.726ct / Diamond 0.55ct Pendant (Necklace) with Japan-Germany Gemological Report Sale price¥110,000

《New Arrivals from Tucson・Limited to 9 Stones》Canary Yellow Tourmaline from Zambia, average 0.18ct《Multi-purchase discount available》 Sale price¥3,980

[Calafri] K18WG Tsavorite 0.57ct Ring with Certificate Sale price¥89,800

[Colorful] Pt900 Black Opal 1.24ct / Diamond 0.70ct Ring with Appraisal Certificate Sale price¥228,000

Ceylon Blue Sapphire (Ice Blue) 0.289ct Loose Sale price¥9,800

[Colorful] K18WG Blood Coral and Diamond (0.19ct) Brooch with certificate Sale price¥398,000

K18WGクリノヒューマイト1.79ct ・ダイヤモンドペンダントトップ（ネックレストップ）

[ColorFleuri] K18WG Clinohumite 1.79ct and Diamond 0.12ct Pendant Top (Necklace Top) with Japanese and German Gemstone Report Sale price¥98,000

K18 Peridot and Diamond 0.03ct Ring Sale price¥45,800

Brown Diamond 6.5mm/0.989ct Loose Stone (FANCY DARK ORANGE BROWN, SI-2) Sale price¥98,000

[On sale May 10th at 10 PM] Tanzanian Spessartine Garnet 0.359ct Loose Stone Sale price¥9,800

[Sale on May 5th at 10 PM] Tanzanian Spessartine Garnet 0.417ct Loose Gemstone Sale price¥12,800

[Available for purchase on 5/6 at 10 PM JST] Australian Black Opal 6.558ct Loose Stone with Certification Sale price¥39,800

[On sale May 2 at 10 PM JST] Sri Lankan Topaz Cat's Eye 3.384ct Loose Stone with Japan-Germany Gemological Report Sale price¥12,800

Mexican Cantera Opal 1.867 ct Loose Stone Sale price¥12,800

Mexican Cantera Opal 3.051ct Loose Stone Sale price¥18,800

[On sale May 6th at 10 PM JST] Mexican Cantera Opal Loose Stone 7.207ct Sale price¥25,800

Mexican Cantera Opal 7.619 ct Loose Stone Sale price¥25,800

Mexican Cantera Opal 10.379ct Loose Stone Sale price¥39,800

カメレオンダイヤモンド 0.128ctルース(FANCY LIGHT GRAY GREEN, SI-1)

[Sale on May 9, 10 PM JST] Chameleon Diamond 3.2mm/0.128ct Loose Stone (FANCY LIGHT GRAY GREEN, SI-1) Sale price¥31,800

カメレオンダイヤモンド 0.079ctルース(FANCY LIGHT GRAY GREEN, SI-1)

Green Diamond, Chameleon Diamond 0.079ct Loose Stone (FANCY LIGHT GRAY GREEN, SI-1) Sale price¥25,800

グレーダイヤモンド 2.8mm/0.089ctルース(LIGHT GRAY, SI-2)

Gray Diamond 2.8mm/0.089ct Loose (LIGHT GRAY, SI-2) Sale price¥16,800

【32501879掲載】グレーダイヤモンド 0.096ctルース(VERY LIGHT GRAY, SI-1)

Gray Diamond, 2.9mm/0.096ct Loose (VERY LIGHT GRAY, SI-1) Sale price¥15,800

Brazilian Bicolor Tourmaline 0.780ct Loose Sale price¥12,800

[On sale May 2nd at 10 PM JST] Mexican Cantera Opal 27.410ct Loose Stone Sale price¥25,800

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・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.