Width: 4.1 - 5.0mm

[Available July 11, 10 PM JST] Kenya Bi-Color Grossular Garnet 0.809 ct Loose Stone Sale price¥25,800

[On sale July 10th at 10 PM] Brazilian Dumortierite in Quartz 1.684 ct Loose Stone Sale price¥12,800

[Listing 12563380] Unset 1.077ct Tanzanian Zircon Sale price¥12,800

[Listed as 12562693] Malawi Bicolor Zircon 1.434ct Loose Sale price¥79,800

[Lottery Sale_0612_01] Madagascar Bekily Blue Garnet (Color Change Garnet) 0.542ct Loose Sale price¥55,800

[On sale July 3 at 10 PM] Tanzanian Bi-Color Grossular Garnet 0.934ct Loose Stone Sale price¥24,800

[On sale July 9th at 10 PM JST] Tanzanian Bicolor Grossular Garnet 0.787ct Loose Stone Sale price¥19,800

[On sale 7/9 at 10 PM] Brazilian Santa Maria Aquamarine Loose Stone 0.188ct with certification Sale price¥25,800

[On sale July 4th at 10 PM] Brazilian Dumortierite in Quartz, 1.290ct Loose Stone Sale price¥12,800

[On sale July 4th at 10 PM] Brazilian Dumortierite in Quartz, 1.349ct Loose Stone Sale price¥12,800

[On sale July 12th at 10 PM] Synthetic Rutile 4.3mm/0.447ct Loose Gemstone Sale price¥12,800

[On sale July 5th at 10 PM] 0.566ct Loose Tanzanian Mahenge Spinel (Pink Spinel) with identification Sale price¥55,800

【Sales start: July 10, 10 PM JST】Madagascar Sapphire 0.553ct Loose Gemstone with Identification Report Sale price¥13,800

[On sale July 5th at 10 PM] Madagascar Padparadscha Sapphire 4.5mm/0.416ct Loose Stone with Chubo Certification Sale price¥98,000

インターナリーフローレスダイヤモンド 0.272ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_03] Internally Flawless Diamond 4.2mm/0.272ct Loose (D, IF, 3Excellent H&C) GIA Sale price¥138,000

フローレスダイヤモンド（H&C） 0.290ctルース(D, FL, 3Excellent H&C)

【Lottery Sale 0530_05】Flawless Diamond (H&C) 4.3mm/0.290ct Loose Stone (D, FL, 3Excellent H&C) GIA & Central Gem Lab Sale price¥198,000

フローレスダイヤモンド（H&C） 4.2mm/0.280ctルース(D, FL, 3Excellent H&C) GIA&中宝

【Lottery Sale 0620_09】Flawless Diamond (H&C) 4.2mm/0.280ct Loose Stone (D, FL, 3Excellent H&C) GIA&CGL Sale price¥188,000

Brazilian Euclase 0.695ct Loose Stone Sale price¥18,800

Tanzanian Lavender Tanzanite 0.558ct Loose Stone Sale price¥12,800

Tanzanian bicolor tanzanite 0.573ct loose stone Sale price¥12,800

Tanzanian Lavender Tanzanite 0.577ct Loose Stone Sale price¥12,800

Sri Lankan Chrysoberyl Cat's Eye 1.074ct Loose Stone Sale price¥4,980

Brazilian Green Tourmaline 0.825ct Loose Stone Sale price¥9,800

ブラジル産ティンカーベルクォーツ（ピンクファイヤークォーツ） 0.344ctルース

Brazilian Tinkerbell Quartz (Pink Fire Quartz) 0.344ct Loose Stone Sale price¥9,800

Tanzania Bicolor Zoisite 4.6mm/0.489ct Loose Stone Sale price¥9,800

Tanzania Bicolor Zoisite 4.8mm/0.540ct Loose Stone Sale price¥9,800

[On sale June 17th at 10 PM] Indian Parrot Chrysoberyl Cat's Eye 0.792ct Loose Stone Sale price¥29,800

【On sale June 26th, 10 PM JST】Indian Parrot Chrysoberyl 0.518ct Loose Gemstone Sale price¥29,800

Tanzanite from Tanzania 0.497ct loose stone Sale price¥9,800

Tanzania Bicolor Zoisite 4.7mm/0.486ct Loose Stone Sale price¥9,800

Blue sapphire 0.287ct loose Sale price¥12,800

Tanzanian Rhodolite Garnet 0.448ct Loose Stone Sale price¥6,980

Tanzanian Rhodolite Garnet 0.810ct Loose Stone Sale price¥9,800

Padparadscha Sapphire 0.560ct Loose Stone Sale price¥75,800

[On sale July 4th, 10 PM JST] Madagascar Padparadscha Sapphire 4.0mm/0.278ct Loose Stone, Central Gem Lab certified Sale price¥39,800

[On Sale July 10th, 10 PM] Tanzanian Zircon 1.841ct Loose Gemstone with Certificate Sale price¥18,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.582ctルース

[On sale June 21st at 10 PM] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.582ct Loose Stone Sale price¥6,980

Zimbabwean Blue Apatite (UV Type) 0.650ct Loose Sale price¥9,800

YAG (Yttrium Aluminum Garnet) 4.9mm/0.574ct loose stone Sale price¥8,800

YAG (Yttrium Aluminum Garnet) 5.0mm/0.672ct loose stone Sale price¥9,800

YAG (Yttrium Aluminum Garnet) 4.1mm/0.346ct Loose Stone (Rose Cut) Sale price¥8,800

Pakistani Oil in Quartz 0.438ct Loose Stone Sale price¥6,980

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.807ctルース

[On sale June 26th, 10 PM JST] Madagascar Andesine-Labradorite (Common name: Rainbow Moonstone) 0.807ct Loose Sale price¥8,800

マダガスカル産アンデシン・ラブラドライト（通称名レインボームーンストーン） 0.619ctルース

[On sale June 21st at 10 PM] Madagascar Andesine-Labradorite (commonly known as Rainbow Moonstone) 0.619ct Loose Stone Sale price¥6,980

[On sale June 22nd at 10 PM JST] Madagascar Canary Yellow Chrysoberyl 0.650ct Loose Stone with Appraisal Sale price¥18,800

[On sale June 26th at 10 PM] Madagascar Canary Yellow Chrysoberyl 0.569ct Loose Gemstone with Certificate Sale price¥9,800

Vietnam Aquamarine 0.398ct Loose Sale price¥5,980

Brazilian Imperial Topaz 0.746ct Loose Sale price¥18,800

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.