![[On Sale 10/5 at 10 PM] [Limited to 11 Stones] Synthetic Moissanite Gacha 💎 Koshu Kiriko Plus Three Moissanite, Sange Cut, Pink, and Blue Moissanite, Loose Stones Included [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/collage_651faf70-f61a-4363-8c57-36a5e217dbd0.png?v=1759535374&width=2250)
![[On Sale 10/4 at 10 PM] Limited to 3 Stones: Synthetic Black Moissanite Loose Stone (2.5mm, Round Cut) [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/P1010072_20121cad-8aa9-44eb-95d5-6ff7d148f53e.jpg?v=1759534849&width=3350)
![[On sale from 10/5 at 10 PM] Limited to 9 stones: 1 loose Australian opal (faceted cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/15_dc816088-689d-48f9-a277-773d85ed082c.png?v=1759454434&width=1500)
![[Available at 10 PM on October 5th] Limited to 4 stones: Sri Lankan Rhodolite Garnet (4mm, Round Cut) - 1 loose stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/11_68a1bbaf-11da-453a-b687-bb5d166e5fdb.png?v=1759451951&width=4000)
![[On sale from 10/5 at 10 PM] Limited to 9 stones. All stones come with a certificate of authenticity. One loose Zoisite stone (yellow, pink-brown, green, etc.). Discounts available for multiple purchases.](http://store.karatz.jp/cdn/shop/files/8_c59ee992-4d3e-44ec-9288-7314d219d00f.png?v=1758897171&width=4000)
Aquamarine 1.574ct loose stone
Sale price¥9,800
[Rouge cut] Almandine garnet 1.725ct loose
Sale price¥7,980
Mali Garnet (Grossular/Andradite Garnet) 4.5mm/0.497ct Loose
Sale price¥8,800
UV type mint garnet 0.435ct loose
Sale price¥3,980
UV type mint garnet 0.521ct loose
Sale price¥3,980
Jeremejevite from Namibia 0.034ct loose
Sale price¥9,800
Bicolor tanzanite 1.165ct rough stone from Tanzania
Sale price¥7,980
Bicolor tanzanite 1.121ct rough stone from Tanzania
Sale price¥6,980
Bicolor tanzanite 0.492ct raw stone from Tanzania
Sale price¥6,980
Pink zoisite 3.206ct rough stone from Tanzania
Sale price¥7,980
Bicolor tourmaline 0.418ct loose
Sale price¥3,980
Synthetic rutile 2.031ct loose
Sale price¥9,800
Brazilian rainbow scapolite 6mm/0.516ct loose
Sale price¥2,980
Brazilian Medusa Quartz (Paraiba Quartz) 1.181ct loose
Sale price¥3,980
Brazilian Medusa Quartz (Paraiba Quartz) 1.008ct loose
Sale price¥4,980
Hemimorphite from Congo 0.432ct loose
Sale price¥6,980
Australian boulder opal 0.874ct loose
Sale price¥3,980
Australian boulder opal 1.156ct loose
Sale price¥3,980
Australian boulder opal 1.173ct loose
Sale price¥5,980
Australian boulder opal 0.982ct loose
Sale price¥6,980
![[On Sale at 10pm on October 8th] Afghanistan Hackmanite 0.134ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P1010004_06442891-88dd-4cd9-94d8-841113444d41.jpg?v=1759709908&width=2971)
![[On Sale at 10pm on October 8th] Afghanistan Hackmanite 0.121ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA034188_bdf22883-abdb-4e24-a418-c1adb2f30066.jpg?v=1759634868&width=2825)
![[On Sale at 10 PM on October 8th] Brazilian Lavender Quartz (Scorolite) 0.797ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA034221.jpg?v=1759634731&width=4000)
![[On Sale at 10 PM on October 8th] Brazilian Pink Tourmaline 0.385ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA034263_9b010db0-a87e-4867-9081-91a11e7d2d6e.jpg?v=1759634363&width=2895)
![[On Sale at 10 PM on October 8th] 0.597ct Green Apatite Loose Stone from Madagascar](http://store.karatz.jp/cdn/shop/files/PA034253_1f123a5a-f05c-4ed9-8b82-0193992482ec.jpg?v=1759634587&width=3100)
![[On Sale at 10 PM on October 8th] Pakistani Oil-in-Quartz 0.353ct Loose Stone (Faceted)](http://store.karatz.jp/cdn/shop/files/collage_a5f64669-c631-449a-91f8-20b78bf670c4.png?v=1759634145&width=2250)
![[On Sale at 10 PM on October 6th] Madagascar Golden Iolite (Cordierite) 0.193ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA034521_096b674b-5591-4711-acd0-f9df63318ff0.jpg?v=1759628928&width=2926)
![[On Sale at 10 PM on 6th October] Tanzanian Sunstone (Illusion Sunstone) 5.0mm/0.338ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA034597_b9b64fbe-8bfe-4fec-9647-c67a02d73916.jpg?v=1759628545&width=3227)
![[On Sale at 10pm on 6th October] Australian Prehnite 0.707ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA034673_06eed45a-5829-44cb-9897-27b0c3ee8fdb.jpg?v=1759629066&width=4000)
![[On sale from 10/6 at 10pm] Brazilian Imperial Topaz 0.394ct Loose](http://store.karatz.jp/cdn/shop/files/PA034555_a8d40a93-ee5c-47c1-b39b-3c34085d382a.jpg?v=1759628722&width=3147)
[On sale from 10/6 at 10pm] Brazilian Imperial Topaz 0.394ct Loose
Sale price¥8,800
![[On Sale at 10 PM on October 6th] [Rouge Cut] Brazilian Bicolor Tourmaline 0.578ct Loose Stone](http://store.karatz.jp/cdn/shop/files/PA034631_27397db9-2c5e-4fef-85da-0a984eb085ea.jpg?v=1759628304&width=3144)
![[On sale from 10/4 at 10 PM] [Limited to 17 stones] Tanzanian Bicolor Sapphire Loose Stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010326.jpg?v=1759127192&width=4000)
![[On sale at 10 PM on September 29th] [Limited to 14 stones] Brazilian Dendritic Quartz Loose Stone (Average 7 carats) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010182_dba92f7a-563c-4cb3-8248-3f75fd0cdc47.jpg?v=1759117806&width=4000)
![[On Sale 10/3 at 10 PM] [Limited to 15 stones] Brazilian Silky Alexandrite Loose Stone (2.5-3.0mm, Round Cut) [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/collage_b702beb3-5799-418b-a516-97bbd0fe7bd9.png?v=1759116364&width=2250)
![[On sale at 10 PM on September 28th] [Limited to 9 sets] Rainbow Garnet Rough Stone + 2 Loose Stones Set from Tenkawa Village, Nara Prefecture [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/9_622850c1-b0a5-4d6d-a4b7-e4d8395feec1.png?v=1758934193&width=4000)
Brazilian lepidocrocite in quartz 2.223ct loose
Sale price¥2,980
Italian leucite 0.130ct loose
Sale price¥8,800
Sri Lankan white sapphire 2.9mm/0.086ct loose (rose cut)
Sale price¥3,980
Color change garnet from Madagascar 0.855ct loose
Sale price¥9,800
Color change garnet from Madagascar 0.648ct loose
Sale price¥8,800
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.
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.