Sale

[Lottery Sale 0812_19] Bolivian Phosphophyllite 1.806ct Loose Stone with Gemstone Identification Report Sale price¥69,800

【Lottery Sale 0818_02】Brazilian Fanaizinho Sphene 0.956ct Loose Stone with Certificate Sale price¥19,800

K18 マダガスカル産パパラチアサファイア 4.3mm/0.412ct・ダイヤモンド0.57ctリング中宝鑑

[Lottery Sale 0812_11] K18 Madagascar Padparadscha Sapphire 0.412ct / Diamond 0.57ct Ring Sale price¥168,000

【9/6 22時販売】インターナリーフローレスダイヤモンド（H&C） 4.0mm/0.245ctルース(D, IF, 3Excellent H&C) Sale price¥128,000

{June Campaign Limited Edition} Rare Stone Gacha💎 Padparadscha Sapphire 0.3ct+ with Certificate, Benitoite, Red Beryl, etc. Loose Stones for 1 Stone {Multiple Purchase Discounts Available} Sale price¥7,980

[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available" Sale price¥18,800

【9/5 22時販売】《限定3石》トップクオリティのアメリカ産ベニトアイト（プリンセスカット,2mm）《複数購入割引有》 Sale price¥12,800

【9/5 22時販売】《限定4石》ローズカットのターコイズ（訳ありサンジェ氏カット,最大12mm）《複数購入割引有》 Sale price¥2,980

【9/5 22時販売】《限定6石》ゾイサイトガチャ全石鑑別書付き（ピンクゾイサイト、イエローゾイサイト、グリーンゾイサイト、タンザナイト含む,5mm）《複数購入割引有》 Sale price¥6,980

[Lottery Sale 3][For Winners Only][Listed as 22602615] K18/Pt950 Brazilian Paraiba Tourmaline 0.053ct Ring (CuO: 1.4%, MnO: 3.1%) Sale price¥158,000

[Jeweler's Tools] 3-piece set: Jewelry Loupe (14x magnification), Blue Diamond, and Pink Tourmaline or Sapphire Sale price¥3,980

【9/5 22時販売】ブラジル産パライバトルマリン 4.022ctルース Sale price¥45,800

【9/5 22時販売】ブラジル産パライバトルマリン 20.766ct原石 Sale price¥25,800

【9/5 22時販売】ブラジル産パライバトルマリン 20.758ct原石 Sale price¥29,800

【9/5 22時販売】ブラジル産パライバトルマリン 20.343ct原石 Sale price¥15,800

【9/5 22時販売】ブラジル産パライバトルマリン 8.246ct原石 Sale price¥25,800

Pt900 キャシテライト 4mm/0.57ct ・ダイヤモンド0.16ctペンダントトップ（ネックレストップ）鑑別書

[Lottery Sale 0812_03] Pt900 Cassiterite from Yunnan Province, China 4mm/0.57ct Diamond 0.16ct Pendant Top (Necklace Top) with Appraisal Certificate Sale price¥69,800

Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available] Sale price¥5,980

[Lottery Sale ②_202608_02] Unheated Kashmir Sapphire 2.6mm/0.110ct Loose Stone GIA Sale price¥79,800

【Lottery Sale ②_202608_12】Brazilian Bi-Color Pink Euclase 3.210ct Loose Stone with Japan-Germany Gemological Report Sale price¥798,000

[Lottery Sale 0707_04] Unheated Kashmir Sapphire 0.220ct Loose Stone GIA Sale price¥158,000

[Lottery Sale 0620_03] South African Rhodochrosite 2.694ct Loose Stone Sale price¥228,000

[Listed under 12563270] South African rough diamond (sawable) 0.477ct Sale price¥178,000

[Lottery Sale 0718_05] Unheated Australian Teal Blue Sapphire 1.010 ct Loose GIA Sale price¥128,000

Spanish Sphalerite 2.726ct loose stone Sale price¥32,800

Spanish bicolor sphalerite 3.504ct loose stone Sale price¥35,800

1.953ct Bicolor Sphalerite from Spain Sale price¥18,800

Zimbabwean Apatite (UV Type) 0.585ct Loose Sale price¥8,800

Zimbabwean Apatite (UV type) 0.209ct loose stone Sale price¥4,980

Brazilian Rubellite Cat's Eye 1.180ct Loose Stone Sale price¥25,800

Green tourmaline 0.512ct loose stone Sale price¥8,800

Nigerian Aventurine Aquamarine 0.471ct Loose Stone Sale price¥6,980

Brazilian Lepidocrocite in Quartz 1.126ct Loose Stone Sale price¥9,800

Brazilian Morganite 4.720ct loose stone Sale price¥98,000

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

【12551314掲載】ジンバブエ産ブルーアパタイト（UVタイプ） 1.019ctルース

Zimbabwean Blue Apatite (UV Type) 1.019ct Loose Sale price¥8,800

【12553261掲載】ロシア産ダイヤモンド原石（ソーヤブル） 0.094ctルース

Russian diamond rough (sawable) 0.094ct rough Sale price¥19,800

Bicolor Euclase from Zimbabwe 0.033ct loose Sale price¥18,800

Pakistani Lazurite (Azurite) 0.305ct Loose Stone Sale price¥49,800

[Lottery Sale ②_9][Winners Only][Listing 12563396] Brazil Rutile (Single Crystal) 1.474ct Loose Stone with Certification Sale price¥39,800

[Lottery Sale 0707_10] Unheated Montana Sapphire (Yogo Mine) 0.173ct Loose Stone with Japan-Germany Gemological Report Sale price¥98,000

[Lottery Sale 0725_05] Madagascar Teal Blue Sapphire 0.748ct Loose Stone with Appraisal Sale price¥28,800

【Lottery Sale 0718_07】Tanzanian Pink Zoisite 0.398ct Loose Stone with Certificate Sale price¥59,800

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

Lottery Sale 0812_15: Brazilian Indicolite Tourmaline 3.756ct Loose Stone with Japan-Germany Gemological Report Sale price¥98,000

【9/4 22時販売】《限定16石》コロンビア産エメラルド原石（平均0.35ct）《複数購入割引有》 Sale price¥5,980

ブラジル産パライバトルマリン 0.239ctルース（CuO:1.0%、MnO:3.9%）

Brazilian Alexandrite 0.239ct Loose Gemstone [Listed as 12564071] Sale price¥45,800

【9/5 22時販売】K18WG オーロラ天女・アコヤ真珠（アコヤパール）ダイヤモンドブローチ真科研鑑 Sale price¥98,000

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.