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 "

Let's try jewelry polishing "Do-it-yourself rough stone polishing set" (for beginners: fluorite 2 stone set) Sale price¥2,980

1 Ruby from Greenland (round cut, 1.2mm)《Discount available for multiple purchases》 Sale price¥2,280

[Available 9/26 at 10 PM] <limited quantity> Hong Kong Sourcing Gacha (7 types including Tanzanite, Hauyne, Color-Change Sapphire, Bekily Blue Garnet, etc.) 1 stone (plus 1 Rainbow Obsidian) <multiple purchase discount available></multiple></limited>

[Available 9/26 at 10 PM] Hong Kong Sourcing Gacha (7 types including Tanzanite, Hauyne, Color-Change Sapphire, Bekily Blue Garnet, etc.) 1 stone (plus 1 Rainbow Obsidian) Sale price¥3,300

ブラジル産カラーチェンジフローライト1石ルース（6mm,ラウンドカット）《複数購入割引有》

Color change fluorite from Brazil 1 stone loose (6mm, round cut)《Multiple purchase discount available》 Sale price¥2,580

Chinese color change fluorite 1 stone loose (6mm, round cut) {Multiple purchase discount available} Sale price¥1,980

Limited to 18 stones: Mozambique ruby (princess cut, 2.3-2.5mm) Multiple purchase discounts available Sale price¥3,980

[Available 9/19 at 10 PM] 《Limited to 26 stones》 Oil-in-Quartz from Pakistan 《Multi-purchase discounts available》 Sale price¥1,580

Chinese color change fluorite 1 stone loose (7mm, round cut) {Multiple purchase discount available} Sale price¥2,580

《Only 3 stones left》 Win a Koshu Kiseki Kiriko "Akatsuki" (plus three), normally 45,800 yen, in this Scapolite Gacha 《Multi-purchase discount available》 Sale price¥4,980

Limited quantity: 1 impregnated ruby loose (4mm, round cut, identification instructions included) Multiple purchase discounts available Sale price¥1,980

[Available 9/18 at 10 PM] 《Limited to 13 stones》 Afghanite loose stone from Afghanistan (average 2.0ct, cabochon cut) 《Multiple purchase discount available》 Sale price¥2,980

Set of two fluorite rough stones from Diana Maria and Lady Annabella, UK (multiple purchase discounts available) Sale price¥3,980

[9/22 8:00 PM Sale] Fluorite Gacha: Win a Koshu Kiseki Kiriko (Limited to 16 stones) [Multi-purchase discount available] Sale price¥2,980

[On sale August 14th, 10 PM] Limited 10 pieces: Zimbabwe Mint Fluorite Single Stone Loose (average 2.2ct) [Bulk purchase discount available] Sale price¥4,580

1.758 ct Ruby Loose Stone from Vietnam with Identification Report Sale price¥49,800

Mozambique Ruby 0.544ct Loose Stone with Certificate of Authenticity Sale price¥39,800

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

[Ref: 22602726] [Colorful] K18WG Ruby & 0.02ct Diamond Ring with Appraisal Report Sale price¥98,000

[Mon, Sep 14, 10:00 AM Deadline: Lottery Sale_09] Unheated Pigeon Blood Ruby 0.620ct Loose Stone AIGS Sale price¥148,000

[10/3 10 PM Release] Afghan Hauyne 0.093ct Loose Stone Sale price¥22,800

[10/3 10 PM Sale] Afghan Hauyne 0.095ct Loose Gemstone Sale price¥18,800

[Available 10/3, 10:00 PM] Afghan Hauyne 0.067ct Loose Stone Sale price¥12,800

[10/7 10:00 PM Release] Afghan Hauyne 0.082ct Loose Stone Sale price¥12,800

[Available 10/10 at 22:00] Afghan Hauyne 0.226ct Loose Gemstone Sale price¥18,800

[Available 10/7 at 10 PM] Afghan Hauyne 0.183ct Loose Gemstone Sale price¥19,800

[Available 10/4, 10 PM] Synthetic Ruby 1.803ct Loose Gemstone Sale price¥18,800

[10/4, 10:00 PM Sale] Synthetic Ruby 1.182ct Loose Stone Sale price¥12,800

[Item 12561430] Unheated Pigeon Blood Ruby 0.510ct Loose Stone Sale price¥89,800

【9/4 10 PM Release】《Limited to 5 stones》Pyrite in Afghanite, approx. 2ct each《Multi-buy discount available》 Sale price¥3,980

[9/14 (Mon) 10:00 AM Deadline: Lottery Sale_08] Unheated Pigeon Blood Ruby 0.270ct Loose Stone AIGS Sale price¥48,800

[Available 9/25, 10 PM] Pigeon Blood Ruby 3.6mm/0.220ct Loose Gemstone AIGS Sale price¥49,800

[Available 9/22, 10 PM] Unheated Pigeon Blood Ruby 0.310ct Loose AIGS Sale price¥49,800

[On sale 9/21 at 22:00] Ruby 0.176ct Loose Stone Sale price¥15,800

Pakistani Oil in Quartz 0.283ct Loose Stone Sale price¥6,980

Pakistani Oil in Quartz 0.328ct Loose Stone Sale price¥7,980

[On Sale 9/14, 10:00 PM] [Colorifi] Pt900 Ruby 0.71ct / Diamond 0.24ct Ring with Appraisal Report Sale price¥98,000

[Available 9/4 at 10 PM] Ruby 0.411ct Loose Stone Sale price¥18,800

【9/4 10:00 PM Sale】Ruby 0.200ct Loose Stone Sale price¥12,800

[Available 9/4 at 10 PM] Ruby 0.141ct loose stone Sale price¥9,800

【9/6 10PM On Sale】Pakistan Oil-in-Quartz 0.281ct Loose Gemstone Sale price¥4,980

[9/7 22:00 Release] Pakistani Oil-in-Quartz 0.505ct Loose Stone Sale price¥4,980

Green Fluorite 38.074ct Loose Sale price¥148,000

[8/29 10 PM Sale] Tanzanian Mint Garnet 0.296ct Loose Gemstone Sale price¥8,800

【#202607 Akihabara Pop-up Store - Currently Removed from Stock】【Listed on 12563192】Unheated Ruby 0.210ct Loose Stone Sale price¥62,800

[#202607AkihabaraPop-upExhibition][12563418Posted] Burmese Ruby 0.303ct Loose Sale price¥9,800

[On sale 9/1 at 22:00] Pigeon Blood Ruby 0.350ct Loose Stone AIGS Sale price¥49,800

[Available 9/2, 10:00 PM] Pigeon Blood Ruby 0.325ct Loose Stone, JTL Certified Sale price¥69,800

[Published 22602679] [Calafuri] Pt900 Thai Ruby 1ct Ring Sale price¥298,000

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.