¥10,000 - ¥30,000

Additional charge: K18YG (base metal) + 20,000 yen Sale price¥20,000

Additional charge: K18WG (base metal) + 20,000 yen Sale price¥20,000

[Option] Fee for obtaining a certificate of origin from the Japan-Germany Gem Laboratory Sale price¥15,000

[Option] GIA certificate issuance fee Sale price¥15,000

Anime "Assassination Classroom" x KARATZ Collaboration Koro-sensei Model Pendant Top Sale price¥19,800

Officially Licensed Product: Limited Quantity & Limited Time 15% Off (¥35,800 → ¥29,800) Yokohama DeNA BayStars Visitor's Blue Ring - Double Type | SV925, Sea Blue Chalcedony, White Chalcedony Sale price¥29,800

Officially Licensed Product: Limited Quantity & Limited Time 15% Off (¥25,800 → ¥21,800) Yokohama DeNA BayStars Visitor's Blue Ring - Single Type | SV925 Sea Blue Chalcedony Sale price¥21,800

[Limited stock] Bakuten!! Collaboration Jewelry - Onaga Earrings (Earrings) Sale priceFrom ¥27,800

[Mr. Yukio Shimizu, representative of Shimizu Kiseki] Jewelry Shogi (Hand-polished Shogi) Sale price¥29,800

[Option] Non-heated inspection included Identification certificate issuance fee Sale price¥15,000

Anime "Assassination Classroom" x KARATZ Collaboration Koro-sensei Model Bracelet Sale price¥19,800

Additional charge for resizing: 25,000 yen Sale price¥25,000

Additional charge: K18WG (base metal) + 15,000 yen Sale price¥15,000

[Option] Paraiba tourmaline analysis report attached identification certificate issuance fee Sale price¥15,000

Kochi Prefecture Blood Red Coral Loose (6-8mm / damaged by water pressure during retrieval) "Multiple purchase discount available" Sale price¥12,800

Limited to 9 stones: Tanzanite loose stone from Tanzania (5x7mm, oval cut) Multiple purchase discounts available Sale price¥12,800

Assassination Classroom x KARATZ Collaboration Koro-sensei Model Necklace Sale price¥22,800

Pakistani Axinite 0.500ct loose stone (green tint) Sale price¥12,800

Additional charge: K18PG (base metal) + 10,000 yen Sale price¥27,000

Additional charge: K18PG (base metal) + 15,000 yen Sale price¥15,000

Additional charges page Sale price¥15,000

[On sale August 24th at 10 PM] Kochi Prefecture Red Coral 1.370ct Loose Stone Sale price¥11,800

[Sale starts August 25th at 10 PM JST] Madagascar Pezzottaite 2.7mm/0.062ct Loose Gemstone Sale price¥11,000

[On sale August 25th, 10 PM JST] Brazilian Rose Quartz 1.816ct Loose Gemstone Sale price¥12,800

[On sale August 25 at 10 PM] Brazilian Limonite in Topaz 5.103 ct Loose Stone Sale price¥12,800

Brazilian Rose Quartz Loose Stone 1.089ct [On Sale August 25th at 10 PM JST] Sale price¥14,800

[On sale August 25th, 10 PM] Ruby 0.168ct Loose Stone Sale price¥11,800

[On sale August 25th at 10 PM] Ruby loose stone, 0.268ct Sale price¥15,800

[On sale August 27 at 10 PM] Hemimorphite from Congo, 4.082 ct loose stone Sale price¥18,800

【Sales start: August 22nd, 10 PM JST】Tanzanian Mint Garnet 0.238ct Loose Stone Sale price¥12,800

[On sale August 22nd, 10 PM JST] Brazilian pink tourmaline 4.9mm/0.400ct loose stone, Hōki Kyō Sale price¥15,800

[On sale 8/22 at 10 PM] Mozambique Ruby 0.409ct Loose Stone (Houseki Kyo) Sale price¥18,800

[On sale August 22, 10 PM] Bi-Color Grossular Garnet from Kenya 0.278ct Loose Sale price¥12,800

[On sale August 23rd at 10 PM] US Oregon Sunstone 6.0mm/ 0.729ct Loose Sale price¥18,800

[On sale August 27th at 10 PM] Sri Lankan green sapphire 0.354ct loose stone with certificate Sale price¥12,800

[On sale August 27th at 10 PM] Tanzanian spinel, 0.644ct loose stone (with needle inclusions) with a gemological report Sale price¥19,800

[On sale August 27 at 10 PM] Tanzanian Spinel 0.536ct Loose (with needle inclusions) - with appraisal report Sale price¥15,800

【Sales start: August 27, 10 PM JST】Brazilian Imperial Topaz 1.324ct Loose Stone with Identification Report Sale price¥29,800

【12563130 Posted】 Nigerian CobaltGahnite 0.176ct Loose Sale price¥24,800

Zimbabwe Euclase 0.134ct Loose Sale price¥25,800

【Listed as 12562263】Brazilian Santa Maria Aquamarine 0.348ct Loose Gemstone Sale price¥12,800

[12563388 listed] Dioptase from Brazil, 0.894ct loose stone Sale price¥22,800

[12563370 listed] Eucrite from Zimbabwe 0.083ct Loose Sale price¥18,800

[Listed as 12563455] Tanzanian Bi-color Grossular Garnet 0.801 ct Loose Stone Sale price¥19,800

[12563744 listed] Bi-color Tourmaline from Brazil 1.153ct Loose Stone Sale price¥12,800

[On sale 8/23 10 PM JST] Brazilian Rio Grande do Norte Apatite Cat's Eye 7.0mm/ 2.219ct Loose Stone with Appraisal Sale price¥22,800

[Sales start August 23rd at 10 PM] Brazilian Rio Grande do Norte Apatite Cat's Eye 1.782ct Loose Stone with Certificate Sale price¥25,800

[On sale August 23rd at 10 PM] Apatite Cat's Eye from Rio Grande do Norte, Brazil, 1.295ct Loose Stone with Certificate Sale price¥19,800

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.