Width: 3.1 - 4.0mm

[On sale July 12th at 10 PM] Madagascar Grandidierite 0.179ct Loose Gemstone with Certificate Sale price¥35,800

coming soon

[12563734] Tanzanian Red Spinel, 0.229ct Loose Sale price¥45,800

[On sale July 12th, 10 PM JST] Colombian Emerald, 0.191 ct loose stone, Hoki Kyokai Sale price¥45,800

[Listing No. 12563397] Brazilian Alexandrite 0.217 ct Loose Stone Sale price¥39,800

[Listed 12563403] Petzottaite from Madagascar 0.200ct Loose Sale price¥29,800

[Posted on 12563395] Tanzanian Pink Spinel 0.148ct Loose Gemstone Sale price¥22,800

【Lottery Sale 0409_01】Myanmar Taaffeite 3.3mm/0.152ct Loose Stone with Certificate Sale price¥49,800

[Available 7/4 10 PM JST] Diamond 3.0mm/0.100ct Loose Stone (E, VVS-2, VeryGood) Sale price¥22,800

[On Sale July 4th at 10 PM] Diamond 3.8mm/ 0.198ct Loose Stone (D, VVS-2, Very Good) Sale price¥29,800

[On sale July 4th at 10 PM] Diamond 0.229 ct Loose (D, VS2, Flanders Cut) Sale price¥39,800

イエローダイヤモンド 0.262ctルース(UNDER S(LIGHT YELLOW), VS1)

[On sale July 4th at 10 PM] Yellow Diamond 0.262ct Loose (LIGHT YELLOW, VS1, Princess Cut) Sale price¥25,800

[On Sale July 9, 10 PM JST] Bicolor Grossular Garnet from Tanzania 0.839ct Loose Stone Sale price¥19,800

【Sale starts 10 PM on July 3rd】Tanzanian Bicolor Grossular Garnet 0.779 ct Loose Stone Sale price¥19,800

【Sales start at 10 PM on July 3rd (JST)】Bicolor Grossular Garnet from Tanzania 0.602ct Loose Gemstone Sale price¥16,800

[On sale July 6th at 10 PM JST] 0.544ct Tanzanian Bi-Color Grossular Garnet Loose Gemstone Sale price¥14,800

【Sales start 10 PM JST on July 6】Tanzanian Bi-Color Grossular Garnet 0.586ct Loose Gemstone Sale price¥14,800

[On sale July 3 at 10 PM] Jeremejevite from Namibia, 0.218ct loose stone, with a certificate of authenticity Sale price¥49,800

[On sale July 4, 10 PM] 0.416 ct Loose Mozambique Ruby with Certificate Sale price¥29,800

[Sale starts July 6th at 10 PM] Sri Lankan Blue Sapphire 4.0mm/0.269ct Loose Stone with Appraisal Sale price¥29,800

[On sale July 9th, 10 PM JST] Tanzanian Windsor Sapphire (Purple Sapphire) 0.393ct Loose Stone with Certificate Sale price¥18,800

[On Sale July 10 at 10 PM JST] Tanzanian Mahenge Spinel (Pink Spinel) 0.333ct Loose Stone with Gemological Report Sale price¥29,800

[On sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.167ct Loose Gemstone with Certificate Sale price¥24,800

[On Sale July 5th at 10 PM] Colombian Emerald 3.3mm/0.158ct Loose Stone with Appraisal Sale price¥18,800

[Sales start July 5, 10 PM JST] Madagascar Padparadscha Sapphire 3.3mm/0.156ct Loose Stone - Central Gem Laboratory certified Sale price¥29,800

インターナリーフローレスダイヤモンド 0.217ctルース(D, IF, 3Excellent H&C)

[Lottery Sale 0530_02] Internally Flawless Diamond 3.8mm/0.217ct Loose Stone (D, IF, 3Excellent H&C) GIA Sale price¥88,000

Brazilian Euclase 0.289ct loose stone Sale price¥12,800

Brazilian Euclase 0.263ct Loose Stone (Colorless Euclase) Sale price¥9,800

Synthetic Alexandrite 0.287ct loose stone Sale price¥8,800

Brazilian Paraiba Tourmaline 0.360ct Loose GIA Sale price¥298,000

Brazilian Green Tourmaline 0.376ct Loose Stone Sale price¥7,980

Brazilian Green Tourmaline 0.332ct Loose Stone Sale price¥7,980

Tanzanite from Tanzania 0.245ct loose stone Sale price¥8,800

Tanzania Bicolor Zoisite 0.295ct Loose Stone Sale price¥7,980

Tanzanite from Tanzania 0.385ct loose stone Sale price¥8,800

Tanzania Bicolor Zoisite 0.286ct Loose Stone Sale price¥7,980

【On Sale June 27, 10 PM】Madagascar Padparadscha Sapphire 3.4mm/0.252ct Loose Stone - Central Gem Laboratory Sale price¥45,800

[On Sale June 28th at 10 PM] Afghan Green Hauyne 0.135ct Loose Stone with Certificate Sale price¥35,800

【Sale starts July 6th at 10 PM JST】Madagascar Pezzottaite 0.323ct Loose Stone Sale price¥49,800

[Sale on July 6th at 10 PM] Brazilian Silky Alexandrite Loose Stone 0.265ct with Certificate Sale price¥45,800

[Sale on 7/1 at 10 PM] Tanzanian Pink Spinel 3.9mm/0.246ct Loose Stone with Certification Sale price¥35,800

[On sale June 23 at 10 PM] Untreated Ruby 0.207ct Loose Stone (Houseki Kyo certificate) Sale price¥69,800

YAG (Yttrium Aluminum Garnet) 3.9mm/0.317ct loose stone Sale price¥6,980

YAG (Yttrium Aluminum Garnet) 3.3mm/0.208ct Loose Stone (Rose Cut) Sale price¥5,980

Nigerian bicolor tourmaline 0.379ct loose stone Sale price¥6,980

Tanzanian green sapphire 0.303ct loose stone Sale price¥8,800

Sri Lankan cobalt spinel 0.281ct loose stone Sale price¥55,800

[On Sale June 24 at 10 PM] Zimbabwe Euclase 0.183 ct Loose Stone with Certificate Sale price¥35,800

[On Sale June 26th at 10 PM] Zimbabwean Euclase 3.4mm/0.206ct Loose Gemstone with Certification Sale price¥29,800

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.