opal

Opal is the birthstone for October. It is broadly divided into two types: "precious opal" which exhibits play-of-color effect, and "common opal" which does not. The impression changes greatly depending on whether there is a play-of-color effect or not, but the atmosphere also changes depending on the way the play-of-color appears and the pattern, and if you own one, you will want to collect many more, making it a collector's item.

Karatz GemMagazine
" opal "

[On sale May 29th at 10 PM] "Checker x Sui" Koshu Kiseki Cut Mexican Fire Opal (usually 79,800 yen) Gacha with only 10 stones available. Win a Fire Opal (and receive one Contraluz!). [Multiple purchase discount available] Sale price¥3,980

[Posted on 12563864] Australian Black Opal 1.797ct Loose Stone Sale price¥69,800

[Posted as 12563996] Australian Black Opal 1.029ct Loose Stone Sale price¥29,800

【#202607 Akihabara Pop-up Store - Currently Removed for Display】[Colorfuri] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate Sale price¥198,000

[#202607 Akihabara Pop-up Store - Currently out on display] [Listed under item 12562542] Australian Black Opal 0.530ct Loose Stone Sale price¥14,800

【スターインカット】メキシコ産ファイアオパール 7mm/0.678ctルースワッペン付

[Star in cut] Mexican fire opal 7mm/0.678ct loose patch Sale price¥39,800

[On sale August 9, 10 PM] Australian Opal 0.674ct Loose Stone with Certificate Sale price¥8,800

[On sale August 1 at 10 PM] Australian black opal 0.702 ct loose stone with certificate Sale price¥29,800

ピンクオパール・ブルーオパール2石セット（小・大サイズ） - KARATZ STORE｜カラッツSTORE

Pink opal/blue opal 2 stone set (small/large size)《Discount available for multiple purchases》 Sale priceFrom ¥1,980

【5/21 22時販売】【KEN氏】メキシコ産オパール1石（約3.5mm）《複数購入割引有》 - カラッツSTORE

1 Mexican opal (approx. 3.5mm) {Multiple purchase discounts available} Sale price¥3,980

1 stone of green opal from South Africa (discount available for multiple purchases) Sale priceFrom ¥2,980

《Limited to 9 Stones》Opal Gacha including Black Opal (plus one bonus Fire Opal) 《Bulk Purchase Discount Available》 Sale price¥3,980

Limited to 10 stones: Australian Opal Lottery with Certificate of Authenticity (including Australian Black Opal) (plus 1 Mexican Fire Opal) (Multiple purchase discounts available) Sale price¥6,980

Tucson New Arrivals / Limited to 28 Stones: Australian Andamooka Black Matrix Opal (Carbon Treated) 1 Loose Stone (Multi-purchase Discount Available) Sale price¥3,980

《New Tucson Arrivals - Limited to 13 Stones》Mexican Opal, including B-grade stones (Egg-in-Opal and Water Opal) 《Multiple Purchase Discount Available》 Sale price¥2,980

Limited to 13 stones: Mexican Opal (Cabochon Cut) Gacha (Multiple purchase discounts available) Sale price¥2,980

New Arrival from Tucson - Limited to 8 Stones: 1 Loose Australian Black Opal (Lightning Ridge Origin) - Multi-Purchase Discount Available Sale price¥5,980

Tucson New Arrivals / Limited 18 Pieces / Peruvian Blue Opal, 1 piece / Bulk Purchase Discount Available Sale price¥3,980

Limited to 12 stones: Mexican opal (custom faceted cut) - 1 loose stone (multiple purchase discounts available) Sale price¥3,980

Limited to 11 stones: Sakura-shaped Contralus Opal and a specially cut Opal Gacha with one loose stone. Discounts available for multiple purchases. Sale price¥3,980

"7-Piece Limited Edition" Mexican Opal, up to 11ct, including some with minor flaws. Multiple purchase discount available. Sale price¥3,980

Limited to 8 stones: 1 Mexican fire opal loose stone with unique color (up to 2.2ct) Multiple purchase discounts available Sale price¥3,980

Limited to 7 stones: 1 loose Australian iron opal (average 7ct, October birthstone opal) Multiple purchase discounts available Sale price¥4,980

Limited to 23 stones: Ethiopian Opal, 1 loose sphere (4.5-5.0mm) - Multiple purchase discounts available Sale price¥5,980

Opal 0.123ct loose stone Sale price¥5,980

Limited to 7 stones: 1 loose Australian boulder opal (average 25 carats) Multiple purchase discounts available Sale price¥8,800

Limited to 12 stones Tanzanian Milky Opal Cat's Eye (7.5 x 5.5 mm) Multiple purchase discounts available Sale price¥3,980

Mexican Hyalite Opal 2.592ct loose Sale price¥9,800

[On sale August 8th, 10 PM JST] Mexican Cantera Opal 6.357ct Loose Stone (Impregnated) with Japan-Germany Gemological Report Sale price¥18,800

[On sale August 8th, 10 PM JST] Mexican Cantera Opal 5.079 ct Loose Stone (Filled) with Japan-Germany Gemstone Appraisal Sale price¥25,800

[Listed as 12563246] Mexican Fire Opal 1.115ct Loose Sale price¥25,800

1.082ct Loose Australian Black Opal with Certification Sale price¥69,800

Australian Black Opal 1.066ct Loose Sale price¥69,800

Australian Black Opal 0.778ct Loose Sale price¥35,800

[Sales begin 8/3 at 10 PM JST] Australian Black Opal 0.957ct Loose Stone with Appraisal Sale price¥49,800

[Carre Franc] K18PG Shell Opal (Conch Opal), Diamond, Malachite Pendant Top (Necklace Top) with Certificate of Authenticity Sale price¥29,800

Pt900 ブラックオパール 0.58ct ペンダントトップ（ネックレストップ）鑑別書

【Colorfleur】Pt900 Black Opal 0.58ct Pendant Top with Authenticity Card Sale price¥55,800

Pt900 ブラックオパール 0.66ct ペンダントトップ（ネックレストップ）鑑別書

[COLORFUL] Pt900 Black Opal 0.66ct Pendant Top (Necklace Top) with Identification Card Sale price¥55,800

【甲州貴石切子plusthree】メキシコ産ファイアオパール 4.633ctルース《コラボ》ワッペン

[Koshu Precious Stones plusthree] Mexican Fire Opal 4.633ct Loose Stone [Collaboration] Patch Sale price¥49,800

Australian black opal 3.242ct loose stone Sale price¥59,800

Mexican Fire Opal 0.718ct Loose Sale price¥9,800

Mexican Fire Opal 0.593ct Loose (Faceted Cut) Sale price¥9,800

Mexican fire opal loose stone, 1.857 ct Sale price¥25,800

Mexican Fire Opal 2.279ct Loose Stone Sale price¥15,800

Mexican Fire Opal 0.729 ct Loose Stone Sale price¥8,800

Australian Black Opal 1.080ct Loose Sale price¥39,800

0.755 ct Loose Australian Black Opal Sale price¥12,800

0.520ct Loose Australian Black Opal Sale price¥13,800

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.