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fluorescent gemstones

There are some gemstones that emit a neon color when exposed to ultraviolet light. It is thought that the fluorescent substances contained in these materials emit light in response to ultraviolet light. When illuminated with black lights in a darkened room, the neon glow is truly a mystical world. There are many fluorescent gemstones, and they come in a variety of colors. From famous stones that everyone knows to rare rare stones. I think it's fun to collect various things and compare them.

Karatz GemMagazine
" Fluorescent gemstone "

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Sold out 《Purchased in Hong Kong》Afghan Green Hauyne 1 Piece Loose Stone with Full Stone Identification Report《Multiple Purchase Discount Available》

《Purchased in Hong Kong》Afghan Green Hauyne 1 Piece Loose Stone with Full Stone Identification Report《Multiple Purchase Discount Available》

Sold out Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available

Limited to 8 stones: 1 unheated silky pink sapphire from Vietnam (including silky ruby) Discounts for multiple purchases available

Sold out Limited to 12 stones, Pakistani oil in quartz, moving bubbles, 1 loose stone, multiple purchase discounts available

Limited to 12 stones, Pakistani oil in quartz, moving bubbles, 1 loose stone, multiple purchase discounts available
Sold out Pink Diamond Loot Box💎 Fancy Orange Pink 0.188ct and other Fancy-colored pink diamonds (all stones sorted or certified) 《Multiple purchase discounts available》

Pink Diamond Loot Box💎 Fancy Orange Pink 0.188ct and other Fancy-colored pink diamonds (all stones sorted or certified) 《Multiple purchase discounts available》
Sold out Limited to 16 stones: Greenland Ruby, 1.2mm, Loose (Top Quality, Drawstring Pouch Included) Multiple Purchase Discounts Available

Limited to 16 stones: Greenland Ruby, 1.2mm, Loose (Top Quality, Drawstring Pouch Included) Multiple Purchase Discounts Available
Sold out Limited to 17 stones: 1 loose Afghanite stone from Afghanistan. Discounts available for multiple purchases.

Limited to 17 stones: 1 loose Afghanite stone from Afghanistan. Discounts available for multiple purchases.
Sold out [Sales start 8/29 at 22:00] <limited to stones> Purple Scapolite, including Koshu Kiseki Kiriko Purple Scapolite (regular price 59,800 yen), with 1 free Tanzanite stone by Mr. Sange included <multi-purchase discount available></multi-purchase></limited>

[Sales start 8/29 at 22:00] Purple Scapolite, including Koshu Kiseki Kiriko Purple Scapolite (regular price 59,800 yen), with 1 free Tanzanite stone by Mr. Sange included

Sold out Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}

Blue Stone Gacha💎 (Brazilian Paraiba Tourmaline, Mozambique Paraiba Tourmaline, German Auchenite, Benitoite) {Multiple Purchase Discounts Available}
Sold out Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Mini Kite Cut Loose Stone (Includes 2 Paraiba Tourmalines, Green Beryl, Ruby, Peridot, etc.) {Multiple Purchase Discounts Available}

Sold out Limited to 8 stones: Mexican Hyalite Opal Loose (Large 4ct, Fluorescent even in sunlight) Multiple purchase discounts available

Limited to 8 stones: Mexican Hyalite Opal Loose (Large 4ct, Fluorescent even in sunlight) Multiple purchase discounts available
Sold out 《Limited to 10 Stones》Flower-Cut Gem Gacha 💎 Usually 39,800 yen for Sakura-shaped and newly cut rubies (newly cut as a bonus) 《Bulk Purchase Discount Available》

《Limited to 10 Stones》Flower-Cut Gem Gacha 💎 Usually 39,800 yen for Sakura-shaped and newly cut rubies (newly cut as a bonus) 《Bulk Purchase Discount Available》
Sold out Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available

Limited to 10 stones: Greenland Ruby (2mm, with certificate issued by the mine owner) - 1 loose stone - Multiple purchase discounts available
Sold out Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Greenland Ruby Loose (approx. 2.3mm, Top Color, Certificate Included) (Multiple Purchase Discounts Available)

Sold out Tanzanian bicolor mint garnet 1 stone loose (UV type) {Multiple purchase discount available}

Tanzanian bicolor mint garnet 1 stone loose (UV type) {Multiple purchase discount available}

Sold out Afghanite 1 stone loose from Afghanistan《Discount available for multiple purchases》

Afghanite 1 stone loose from Afghanistan《Discount available for multiple purchases》
Sold out Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available]

Limited to 9 stones [Mr. Sanjay] Oil in quartz, spinel, yellow opal 1 loose stone (damaged) [Multiple purchase discount available]

Sold out ジェムガチャ💎 アフガナイト1石 ルース（平均0.14ct）《複数購入割引有》

Gem Gacha💎 Afghanite 1 stone loose (average 0.14ct) {Multiple purchase discount available}

Sold out 【Available Sept 7, 10:00 PM】《Limited to 12 stones》Ruby Gacha featuring Pigeon Blood Rubies and Star Rubies, regularly priced at 59,800 yen and including appraisal certificates 《Multi-purchase discounts available》

【Available Sept 7, 10:00 PM】《Limited to 12 stones》Ruby Gacha featuring Pigeon Blood Rubies and Star Rubies, regularly priced at 59,800 yen and including appraisal certificates 《Multi-purchase discounts available》
Sold out 《Limited to 8 stones》 [Mr. Sanjay] Hackmanite or Sodalite 1 stone loose (maximum 3.63 ct)《Multiple purchase discount available》

《Limited to 8 stones》 [Mr. Sanjay] Hackmanite or Sodalite 1 stone loose (maximum 3.63 ct)《Multiple purchase discount available》
Sold out グリーンランド産アイスルビー 1石（ハートシェイプ,4mm）

Ice ruby ​​from Greenland 1 stone (heart shape, 4mm) Comes with original pouch

Sold out [Available 10/31 at 10 PM] 《Limited to 10 stones》 Zimbabwe Euclase rough (regular price ¥49,800), Brazilian Paraiba Tourmaline (CuO: 1.8%, MnO: 0.1%), or Triplite rough gacha (includes 1 Hackmanite rough) 《Multi-buy discount available》

[Available 10/31 at 10 PM] 《Limited to 10 stones》 Zimbabwe Euclase rough (regular price ¥49,800), Brazilian Paraiba Tourmaline (CuO: 1.8%, MnO: 0.1%), or Triplite rough gacha (includes 1 Hackmanite rough) 《Multi-buy discount available》
Sold out パキスタン産ルビーインクォーツ 1.429ctルース

Pakistan Ruby in Quartz 1.429ct Loose Stone
Sold out K18 ルビー 0.75ct ガーネット,サファイア,アメジスト,エメラルド,トパーズ,ダイヤモンドペンダントトップ（ネックレストップ）鑑別書

K18 ルビー 0.75ct ガーネット,サファイア,アメジスト,エメラルド,トパーズ,ダイヤモンドペンダントトップ（ネックレストップ）鑑別書

Sold out 非加熱ピジョンブラッドルビー 0.620ctルース AIGS

[Mon, Sep 14, 10:00 AM Deadline: Lottery Sale_09] Unheated Pigeon Blood Ruby 0.620ct Loose Stone AIGS

Sold out Pt900 アウイナイト0.04ct・ダイヤモンドリング鑑別書

[Available 9/20 at 10:00 PM] [Coloriful] Pt900 Hauyne 0.04ct & Diamond Ring with Identification Report
Sold out Pt850 ドイツ産アウイナイト 3.6mm/0.13ctct ダイヤモンド0.20ctペンダントトップ（ネックレストップ）鑑別書

Pt850 German Hauyne 3.6mm/0.13ct, Diamond 0.20ct Pendant Top (Necklace Top) with Identification Report

Sold out オイルインクォーツ 0.339ctルース

[Available 9/6 at 10 PM] Pakistani Oil-in-Quartz 0.339ct Loose Gemstone
Sold out モザンビーク産ルビー 0.409ctルース

[On sale 8/22 at 10 PM] Mozambique Ruby 0.409ct Loose Stone (Houseki Kyo)
Sold out ビルマ産ピジョンブラッドルビー 0.450ctルース

[Lottery Sale 0725_11] Burmese Pigeon Blood Ruby 0.450ct Loose AIGS
Sold out アフガニスタン産ハックマナイト 0.110ctルース

[#202607 Akihabara Pop-up Store Takeout in Progress] [12559784 Posted] Hackmanite 0.110ct Loose Stone
Sold out アフガニスタン産ハックマナイト 0.142ctルース

[#202607 Akihabara Pop-up Store Carry Out] [12559782 Listed] Hackmanite 0.142ct Loose
Sold out アフガニスタン産アフガナイト 0.018ctルース

[Sales begin 8/9 10 PM JST] Afghanite from Afghanistan, 0.018ct Loose Stone with Certificate
Sold out ドイツ産アウイナイト 0.081ctルース

[Posted as 12563888] German Hauyne, 0.081ct Loose Gemstone
Sold out ビルマ産ピジョンブラッドルビー 0.300ctルース

[12563504 Listed] Unheated Pigeon Blood Ruby from Burma 0.300ct Loose
Sold out ルビー 0.226ctルース

Mozambique Ruby 0.226ct Loose
Sold out ビルマ産ルビー 0.120ctルース

Burmese ruby 3.1mm/0.120ct loose stone with gemological report
Sold out モザンビーク産ルビー 0.300ctルース

0.300 ct Loose Mozambique Ruby with Certificate
Sold out モザンビーク産ルビー 0.415ctルース

0.415ct Mozambique Ruby Loose Stone with Gemstone Identification Report
Sold out アフガニスタン産グリーンアウイナイト 0.142ctルース

Green Hauyne from Afghanistan, 0.142ct Loose, with Certificate
Sold out K18 ルビー 0.44ct・ダイヤモンド0.18ctリング 鑑別書

[Calafuri] K18 Ruby 0.44ct, Diamond 0.18ct Ring with Appraisal Certificate
Sold out ルビー 0.496ctルース

Ruby 0.496 ct Loose Stone (Houseki Kyo)
Sold out Mexican Hyalite Opal 1.215ct Loose (Faceted Cut)

Mexican Hyalite Opal 1.215ct Loose (Faceted Cut)
Sold out アフガニスタン産ハックマナイト 0.123ctルース

Afghan Hackmanite 0.123ct Loose
Sold out アフガニスタン産ハックマナイト 0.171ctルース

Hackmanite from Afghanistan 0.171ct Loose
Sold out アフガニスタン産ハックマナイト 0.143ctルース

Afghan Hackmanite 0.143ct Loose
Sold out K18 合成ルビー ペンダントトップ（ネックレストップ）

[Calafuri] K18 Synthetic Ruby and Synthetic Spinel Pendant Top (Necklace Top) with Appraisal Report
Sold out Pt950 アウイナイト 0.24ct・ダイヤモンド0.18ctリング 鑑別カード

【Colorflly】Pt950 Hauynite 0.24ct・Diamond 0.18ct Ring with Appraisal Card
Sold out Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

Untreated Vietnamese Star Ruby 1.696ct Loose Stone with Certification

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.