Width: 4.1 - 5.0mm

[On sale June 7th at 10 PM] Nepal Green Kyanite 0.764ct Loose Stone Sale price¥6,980

Tanzanian Chrome Tourmaline 0.522ct Loose Stone Sale price¥3,980

Mozambique Pink Sapphire 0.276ct Loose (Hot Pink Sapphire) Sale price¥9,800

Purple Spinel 4.3mm/0.323ct Loose Stone Sale price¥6,980

Violet spinel 0.301ct loose Sale price¥6,980

Tanzania Zoisite 0.278ct loose stone Sale price¥7,980

Zoisite 0.247ct loose stone (heart shape) Sale price¥7,980

[On sale at 10 PM on June 7] Andalusite from Spain, 0.930ct loose gemstone Sale price¥12,800

[On sale June 7th at 10 PM] Andalusite from Spain, 0.536ct loose stone Sale price¥9,800

[On sale May 24th at 10 PM] Andalusite from Spain 0.598ct Loose Gemstone Sale price¥9,800

[On sale May 24th at 10 PM] Andalusite from Spain, 0.478ct loose stone Sale price¥8,800

[On Sale May 17th at 10 PM] Sri Lankan Chrysoberyl Cat's Eye 4.3mm/0.582ct Loose Stone Sale price¥15,800

【On sale May 15 at 10 PM】Sri Lankan Chrysoberyl Cat's Eye 4.5mm/0.419ct Loose Stone Sale price¥15,800

[On sale May 17th at 10 PM] Indian Parrot Chrysoberyl 0.641ct Loose Stone Sale price¥14,800

[On sale May 23rd, 10 PM JST] Indian Parrot Chrysoberyl 0.518 ct Loose Stone Sale price¥29,800

[On sale May 22nd at 10 PM] Synthetic Alexandrite 4.3mm/0.379ct Loose Stone Sale price¥9,800

[On Sale May 24, 10 PM JST] Synthetic Alexandrite Loose Stone 0.885ct Sale price¥18,800

[On sale 5/21 at 10 PM] Synthetic Alexandrite 0.808ct Loose Stone Sale price¥18,800

[Sale on May 24th at 10 PM JST] Australian Black Opal 0.216ct Loose Sale price¥11,000

[On sale 5/22 at 10 PM] Australian Black Opal 0.325ct Loose Stone Sale price¥9,800

【Sales start 5/13 10 PM JST】Sri Lankan Bi-Color Sapphire, 0.434 ct Loose Stone Sale price¥12,800

[On sale May 12th at 10 PM] Tanzanian Tanzanite 4.1mm/0.295ct Loose Gemstone Sale price¥9,800

インターナリーフローレスダイヤモンド（H&C） 0.360ctルース(D, IF, 3Excellent H&C)

[On sale May 12th, 10 PM JST] Internally Flawless Diamond (H&C) 4.5mm/0.360ct Loose Stone (D, IF, 3Excellent H&C) GIA & CBT Sale price¥188,000

インターナリーフローレスダイヤモンド 0.300ctルース(F, IF, 3Excellent)

[Sale on May 12th at 10 PM] Internally Flawless Diamond 4.3mm/0.300ct Loose (F, IF, 3Excellent) GIA Sale price¥98,000

フローレスダイヤモンド（H&C） 0.230ctルース(D, FL, 3Excellent H&C)

[On sale May 12, 10 PM JST] Flawless Diamond (H&C) 4.0mm/0.230ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL Sale price¥158,000

奈良県天川村産レインボーガーネット（アンドラダイトガーネット） 0.656ctルース

【Sale from 10 PM on May 23】Nara Prefecture Tenkawa Village Rainbow Garnet (Andradite Garnet) 4.8mm/0.656ct Loose Stone Sale price¥11,000

[On Sale May 9th, 10 PM] Sri Lankan Yellow Sapphire 0.517ct Loose Gemstone Sale price¥12,800

[Sale at 10 PM on May 4] Moroccan Cerussite 1.026ct Loose Stone with Japan-Germany Gemological Report Sale price¥69,800

[On sale May 4th, 10 PM JST] Bicolor Benitoite from USA, 0.624 ct loose stone with鑑別書 Sale price¥98,000

Colombian Trapiche Emerald 0.422ct Loose Sale price¥18,800

Bicolor Zoisite 0.823ct rough stone Sale price¥6,980

Ruby 0.528ct Loose Stone with Gem Identification Report Sale price¥28,800

[On Sale May 14th at 10 PM] Colombian Emerald 0.689ct Loose Stone Sale price¥18,800

[On sale May 14 at 10 PM] Nigerian Cobalt-bearing Gahnite 0.572ct Loose Stone with Certificate Sale price¥69,800

Yellow sapphire 0.229ct loose stone Sale price¥8,800

Vietnam unheated silky pink sapphire 0.580ct loose stone Sale price¥12,800

Brazilian Imperial Topaz 0.413ct Loose Stone Sale price¥9,800

Brazilian Imperial Topaz 0.402ct Loose Stone Sale price¥9,800

Lepidocrocite in quartz 0.308ct loose Sale price¥6,980

0.308ct Unset Yellow Sapphire (Sri Lankan) Sale price¥13,800

0.904ct Datolite, USA (Westfield, Manchester) Loose, with Japan-Germany certification Sale price¥29,800

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

【12555695掲載】ブラジル産パライバトルマリンインクォーツ 0.313ctルース

Brazilian Paraiba Tourmaline In Quartz 0.50mm/.313ct Loose Sale price¥15,800

Cambodian Blue Zircon 1.606ct Loose Sale price¥18,800

Iolite Sunstone from India 0.472ct Loose Gemstone Sale price¥5,980

Diamond 0.402ct Loose (H, VS2, Flanders Cut) Sale price¥79,800

Madagascar Bicolor Sphene 1.551ct Loose Stone Sale price¥15,800

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

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.