














Brazilian Medusa Quartz (Paraiba Quartz) 7.250ct Loose
Medusa quartz contains inclusions of the mineral giralite inside the crystal. It is sometimes called giralite-in-quartz, but the GIA has named it "Medusa quartz" because the inclusions resemble a jellyfish called "Medusa Jellyfish." It also has several nicknames, such as "Paraiba quartz" because its beautiful blue color is reminiscent of Paraiba tourmaline and because it was mined in Paraiba, Brazil, where Paraiba tourmaline is produced. Enjoy the mysterious and beautiful world that unfolds inside the stone.
Type: Loose (natural stone)
・Stone name: Medusa quartz (Paraiba quartz)
Weight: 7.250ct
・Size: 14.7 x 10.7 mm
・Shape: Cabochon cut
・Scratches/chips: A+
・Inclusions: ·remarks:---
・Accessories: Caratz quality guarantee, loose case (if it does not fit, a clear zip case)
*We try to make the colors in the photos as close as possible to the actual product, but they may look slightly different from the actual product depending on the lighting conditions at the time of shooting and the monitor environment you are using. Also, some photos may have been taken using a penlight.
*For information on scratches, chips, treatments, and inclusions, please click here .
*For other frequently asked questions, please click here .
karatz_item_id: 12555200
Type: Loose (natural stone)
・Stone name: Medusa quartz (Paraiba quartz)
Weight: 7.250ct
・Size: 14.7 x 10.7 mm
・Shape: Cabochon cut
・Scratches/chips: A+
・Inclusions: ·remarks:---
・Accessories: Caratz quality guarantee, loose case (if it does not fit, a clear zip case)
*We try to make the colors in the photos as close as possible to the actual product, but they may look slightly different from the actual product depending on the lighting conditions at the time of shooting and the monitor environment you are using. Also, some photos may have been taken using a penlight.
*For information on scratches, chips, treatments, and inclusions, please click here .
*For other frequently asked questions, please click here .
karatz_item_id: 12555200
Choose options















Brazilian Medusa Quartz (Paraiba Quartz) 7.250ct Loose
Sale price¥54,800
Regular price





![[10/22, 10:00 PM Sale] <limited to stones> Sky Blue Topaz (Round approx. 8mm, only one stone is approx. 10mm) <multiple purchase discount available></multiple></limited>](http://store.karatz.jp/cdn/shop/files/PA050720_0c803cec-809e-4351-8ed4-19b5405d1e2a.jpg?v=1791592314&width=4000)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/PA174421_dc4a654d-29d9-43bf-a171-6be9a21db408.jpg?v=1792208298&width=3443)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/PA174389.png?v=1792208709&width=4000)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/2026-10-1717.21.50_b5bd12df-a26a-4558-b937-050e8f74386f.png?v=1792225381&width=1256)


![[10/18 10:00 PM Release] Tanzanian Mandarin Garnet 4.5mm/0.529ct Loose Stone with Identification Report](http://store.karatz.jp/cdn/shop/files/PA161584_087bf08f-b8c4-4ad5-839e-853ddac9d8b6.jpg?v=1792157662&width=3280)
![[Ref: 12564456] Mozambique Aquamarine 0.837ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P9304778_1205a47a-754d-4e91-81eb-b5504df57807.jpg?v=1791985647&width=2889)
![[Item 12564407] Stibiotantalite from Afghanistan, 0.200ct loose stone](http://store.karatz.jp/cdn/shop/files/P9087102_156cecc1-8841-415e-947e-90507c14a237.jpg?v=1791932462&width=3296)
![[Item 12564406] Stibiotantalite from Afghanistan, 0.186ct loose stone](http://store.karatz.jp/cdn/shop/files/P9087172_7634593e-09c8-423c-a8d1-5fb037b38167.jpg?v=1791931980&width=3267)
![[Item No. 12564322] Burmese Red Spinel 0.176ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/P9090184_9700c589-2ea2-4930-80df-edac6c0e1e4b.jpg?v=1791931653&width=2569)
![[Item 12564569] Russian Non-Oiled Emerald 0.121ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/PA056832_d8692e6e-41d7-484a-8fb3-f15f7831d546.png?v=1791931343&width=2289)
![[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/PA056278_9e257c06-11b3-4bdf-9629-db55fd3ecd95.jpg?v=1791930983&width=2918)
![[Item 12564627] Bekily Blue Garnet (Color-Change Garnet) from Madagascar, 0.620ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_66b45918-a745-4339-8b28-20879c90c42f.png?v=1791930312&width=2000)
![[Item 12564630] Black Sapphire 5.833ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_5323eca5-42a7-4c5c-93bd-bc2b890eb781.png?v=1791928900&width=2000)
![[Item 12564325] Kenya Gold Sheen Sapphire (Star Sapphire) 0.477ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/P9098894_9e71d12f-afda-46cb-99c2-1c15650319a3.jpg?v=1791805575&width=3070)







![[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones](http://store.karatz.jp/cdn/shop/files/P4130575.jpg?v=1776126091&width=4000)


![[Jeweler's Tools] Color change penlight loose set](http://store.karatz.jp/cdn/shop/files/P1010673_2976de1d-08ce-4d92-94af-524da4485c99.jpg?v=1725605083&width=4000)