Round Cut

カメレオンダイヤモンド 4.0mm/0.255ctルース(LIGHT GRAYISH GREEN YELLOW, VS2)

[For xxx only] Chameleon Diamond 0.255ct Loose (LIGHT GRAYISH GREEN YELLOW, VS2) (Listed under 32501581) Sale price¥59,800

[On sale 7/12 at 10 PM] US Oregon Sunstone 7.1mm/1.397ct Loose Stone Sale price¥39,800

[On sale July 11th at 10 PM JST] USA Oregon Sunstone 10.8mm/4.864ct Loose Gemstone Sale price¥98,000

[On sale July 12th at 10 PM] Bulgarian Sphalerite 7.0mm/1.790ct Loose Stone Sale price¥59,800

[On sale July 10th at 10 PM] US Oregon Sunstone 8.1mm/1.840ct Loose Sale price¥39,800

[12563393 listed] Tanzanian Red Spinel 0.098ct Loose Stone Sale price¥15,800

[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

Paraiba tourmaline from Brazil 0.090ct loose Sale price¥69,800

Paraiba tourmaline from Brazil 0.056ct loose Sale price¥45,800

[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 5th at 10 PM JST] Madagascar Grandidierite 2.8mm/0.086ct Loose Stone with Certification Sale price¥18,800

[On Sale July 5 at 10 PM JST] Madagascar Grandidierite 2.5mm/0.065ct Loose Stone with Certification Sale price¥15,800

[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

[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（H&C） 5.1mm/0.527ctルース(E, IF, 3Excellent H&C)

[Lottery Sale 0530_06] Internally Flawless Diamond (H&C) 0.527ct Loose Stone (E, IF, 3Excellent H&C) Sale price¥228,000

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

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

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

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

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

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

Synthetic Moissanite 0.634ct loose stone Sale price¥9,800

American Herkimer Diamond (Rock Crystal) 5.5mm/0.528ct Loose Sale price¥8,800

Goshenite 5.7mm/0.572ct loose stone Sale price¥5,980

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

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

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

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

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

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

Brazilian Bicolor Tourmaline 7.2mm/1.326ct Loose Stone Sale price¥18,800

Namibian Green Tourmaline 7.0mm/1.206ct Loose Stone (Lagoon Tourmaline) Sale price¥59,800

[On sale June 17th at 10 PM] Canadian Eudialyte 2.4mm/0.052ct Loose Stone with Appraisal Sale price¥15,800

Sold out

[Sales begin June 15th, 10 PM] Myanmar Red Spinel 3.5mm/0.174ct Loose Stone

[Sale starts June 16th at 10 PM] Myanmar Red Spinel 3.3mm/0.172ct Loose Stone Sale price¥8,800

[Sales start 10 PM on June 16] Myanmar Red Spinel 3.5mm/0.214ct Loose Gemstone Sale price¥9,800

[On sale June 14th at 10 PM] Myanmar Red Spinel 3.4mm/0.194ct Loose Stone Sale price¥9,800

[On Sale June 18th at 10 PM] Madagascar Bi-Color Sapphire 3.7mm/0.271ct Loose Gemstone Sale price¥6,980

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.