Cushion cut

[Deadline: Wed, Sept 22 at 10 AM: Lottery Sale_09] Parasitic Peridot 0.536ct Loose Stone, NGL Certified Sale price¥228,000

【11/8 22時販売】アフガニスタン産ハックマナイト 0.314ctルース Sale price¥18,800

【11/2 22時販売】アフガニスタン産ブルーサイト 3.415ctルース Sale price¥35,800

【11/2 22時販売】パキスタン産ヴェイリネナイト 0.051ctルース Sale price¥12,800

【11/3 22時販売】アフガニスタン産ハックマナイト 0.148ctルース Sale price¥22,800

【10/30 22時販売】スリランカ産イエローサファイア 1.996ctルース Sale price¥69,800

【11/10 22時販売】タンザニア産タンザナイト 0.646ctルース Sale price¥25,800

【Available 10/12 at 10:00 PM】 Pakistani Vayrynenite 0.075ct Loose Stone Sale price¥16,800

[10/12 10 PM Release] Pakistani Väyrynenite 0.099ct Loose Gemstone Sale price¥22,800

[Available 10/3, 10 PM] Pakistan Vayrynenite 0.076ct Loose Gemstone Sale price¥16,800

[Available 10/4, 10 PM] Lab-created Alexandrite 0.614ct Loose Stone Sale price¥15,800

[Item 12564350] Ethiopian Sunstone 1.228ct Loose Gemstone Sale price¥18,800

[Available 9/27 at 10 PM] Oregon Sunstone 3.492ct Loose Gemstone Sale price¥55,800

【Lottery Sale 0818_08】Brazilian Bicolor Tourmaline 2.744ct Loose Stone with Certificate Sale price¥59,800

[Available 9/11 at 10:00 PM] Mexican Fire Opal (faceted cut) 1.255ct loose stone Sale price¥49,800

[On sale 9/15 at 10 PM] Tanzanian Blue Spinel 0.725ct Loose Gemstone with Identification Report Sale price¥22,800

Mozambique Pink Tourmaline 1.122ct Loose Stone (Contains CuO) Sale price¥39,800

[Lottery Sale ②_202608_07] Myanmar Orange Spinel 0.855ct Loose Stone Sale price¥98,000

タンザニア産ウィンザーサファイア（カラーチェンジサファイア） 0.261ctルース

【9/12 22:00 Release】 Tanzanian Windsor Sapphire (Color Change Sapphire) 0.261ct Loose Gemstone Sale price¥9,800

【Available 9/3, 10:00 PM】 Sri Lankan Blue Sapphire 0.451ct Loose Gemstone with Appraisal Report Sale price¥29,800

[Listing 12563877] Afghan Green Hauyne 0.269ct Loose Sale price¥98,000

[Lottery Sale 0812_17] Unheated Burmese Jedi Spinel 0.430ct Loose Gemstone GUILD Sale price¥118,000

【Lottery Sale 0428_2_05】American Neptunite 0.859ct Loose Gemstone with Certificate Sale price¥128,000

[Lottery Sale 0725_10] Unheated Mozambique Pigeon Blood Ruby 0.430ct Loose Gemstone AIGS Sale price¥98,000

【Sales start: August 13, 10 PM JST】Loose Zimbabwe Sphene, 0.512 ct, with certificate Sale price¥17,800

Afghan Green Hauyne 0.150ct Loose Stone with Certificate Sale price¥55,800

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） 3.219ctルース

Rainbow Garnet (Andradite Garnet) from Tenkawa Village, Nara Prefecture, 3.219ct Loose Stone Sale price¥24,800

ピンクダイヤモンド 0.075ctルース(FANCY PURPLE PINK, SI1)

Pink Diamond 0.075ct Loose (FANCY PURPLE PINK, SI-1) Sale price¥79,800

ブラウンダイヤモンド 0.728ctルース(FANCY DARK BROWN, SI2)

Brown Diamond 0.728ct Loose (FANCY DARK BROWN, SI-2) Sale price¥49,800

Brazilian Dumortierite in Quartz 1.290ct Loose Sale price¥12,800

Brazilian Black Garden Quartz 5.030ct Loose Gemstone Sale price¥12,800

2.055ct Bicolor Sphalerite from Spain Sale price¥39,800

Mozambique Elbaites Tourmaline / Pink Tourmaline 1.126ct Loose (CuO: 0.2%, MnO: 2.4%) Sale price¥55,800

[12550851] 2.944ct Mozambique pink tourmaline loose stone Sale price¥39,800

Unheated Blue Sapphire 2.430ct Loose GIA Sale price¥258,000

Peruvian Gem Silica (Chrysocolla Chalcedony) 4.098 ct Loose, Japan-Germany certified Sale price¥24,800

Peruvian Gem Silica (Chrysocolla Chalcedony) 3.210ct Loose Stone, Japan-Germany certified Sale price¥19,800

Malawi Moonstone (Malawi Moonstone) 2.209ct Loose Stone Sale price¥15,800

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） 1.101ctルース

6.0mm/1.101ct Loose Andesine-Labradorite from Madagascar (common name: Rainbow Moonstone) Sale price¥16,800

Brazilian Romanesite in Amethyst 7.083ct Loose Stone Sale price¥15,800

Benitoite 0.352ct loose Sale price¥298,000

【32501908掲載】ブラウンダイヤモンド 0.290ctルース(FANCY BROWN, SI-2)

Loose Brown Diamond 0.290ct (FANCY BROWN, SI-2) Sale price¥15,800

Spanish sphalerite 6.392 ct loose stone Sale price¥79,800

0.168ct Pakistan Vayrynenite Loose Gemstone Sale price¥35,800

モザンビーク産エルバイトトルマリン 1.456ctルース（CuO:0.1%,MnO:0.4%）

Elbaite tourmaline from Mozambique 1.456ct loose stone (CuO: 0.1%, MnO: 0.4%) Sale price¥45,800

Sri Lankan Colorless Enstatite 1.877 ct Loose with Japan-Germany Gemological Report Sale price¥29,800

Lagoon Tourmaline from Afghanistan, 2.649 ct Loose Stone, Central Japan Gem Laboratory Sale price¥198,000

Zimbabwean Blue Apatite (UV type) 1.061ct loose stone Sale price¥11,000

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.