August 2026 Campaign Details
Midsummer Gemstone Giveaway Campaign in Progress 💎
Depending on the total amount of your purchases over 9 days, we will present various gemstones, including peridot and spinel, August's birthstones 🎁
Eligibility Period: Saturday, August 8, 2026, 0:00 - Sunday, August 16, 2026, 23:59
――― How to Enter the Campaign ―――
・Simply purchase any item you like at the KARATZ STORE during the eligibility period to automatically complete your entry. No special application is required.
・If you make multiple purchases during the eligibility period, the rank of your prize will change based on your total purchase amount.
――― Important Notes ―――
・Regularly sold items, including books and gemstone encyclopedia 3D stickers, are eligible for the campaign.
・Collaboration items with anime or other works, and KARAFURU are not eligible for the campaign.
・For other details and precautions, please check the bottom of this page.
The prizes are as follows:
[Prize ①]
🎁 All purchasers during the campaign period 🎁
・Original microfiber cloth (Peridot from pallasite pattern) 1 sheet
*Limited quantity / will change to a different pattern once the maximum quantity is reached.
Can be used for cleaning jewelry and loose stones, as well as glasses and smartphone screens.
*Some gemstones are not suitable for cleaning with a cloth. Please refrain from using it on soft gemstones or those with surface treatments/coatings, or check the cleaning method in advance. This cloth does not contain abrasive.
[Prize ②]
🎁 Purchases of 3,000 yen or more 🎁
・Special patch 1 piece
(Shimizu Kiseki cut or Koshu Kiseki Kiriko
・Peridot (round, approx. 3.5mm) 1 stone
・Synthetic Cobalt Spinel 1 stone
・Apatite 1 stone
・Fluorite rough 1 stone
(Total 4 stones + patch)
*Fluorite rough is not suitable for processing with a rough stone polishing set due to its small size.
[Prize ③]
🎁 Purchases of 20,000 yen or more 🎁
・Spinel (Sanjey cut) 1 stone
・Peridot 1 stone
・Yellow Diamond 1 stone
・Vietnam-origin Cobalt Spinel rough 1 stone
(Total 4 stones)
Spinel cut by Mr. Sanjey, a Sri Lankan polisher, has a captivating purple to blue hue. You will receive one stone from a variety of shapes and colors.
[Prize ④]
🎁 Purchases of 60,000 yen or more 🎁
・Myanmar Red Spinel 1 stone
・Tanzanian Mahenge Spinel (small) 1 stone
・Blue/Gray Spinel 1 stone
・Illusion Sunstone (Mirage Flower Cut) 1 stone
・Spinel Rough 1 stone
・Yellow Quartz Rough 1 stone
*Ends when the maximum quantity is reached
[Bonus]
・Ring image holder
(Yellow gold color or silver color)
*Ends when the maximum quantity is reached / Color cannot be chosen
(Total 6 stones + bonus)
This lineup is full of spinel: red spinel, Mahenge spinel, and gray spinel. Spinel has many collectors, and it's easy to see why with its rich color variations. The illusion sunstone has beautiful aventurescence, as if sprinkled with glitter.
【Prize ⑤】
🎁 Purchases of 120,000 yen or more 🎁
・Tanzanian Mahenge Spinel (large) 1 stone
・Myanmar Spinel rough 1 stone
・Chinese Peridot (Star Cut) 1 stone
・Sunstone (Sanjey Cut) 1 stone
・YAG (Sanjey Cut) 1 stone
・Tanzanian Kornerupine 1 stone
・Madagascar Grandidierite 1 stone
・Tibetan Andesine rough 1 stone
【Bonus】
・1 in 2 chance of Peridot rough 1 stone
(Total 8 stones + 1 in 2 bonus)
The Chinese peridot features a beautiful star cut. The Myanmar spinel allows you to enjoy its beautiful color even in its rough state.
[Prize ⑥]
🎁 Purchases of 200,000 yen or more 🎁
・Vietnamese or Tanzanian Color-Shift Cobalt Spinel (with identification certificate) 1 stone
・Shimizu Kiseki Sakura In-cut or Dandelion Cut Andesine 1 stone
(Total 2 stones)
Color-shift cobalt spinel is a rare type of spinel that appears to change color depending on the light source. Shimizu Kiseki's Sakura in-cut or Dandelion cut andesine has a captivating depth of color.
That concludes the lineup.
Please refer to the following for sizes.
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💎Prize Content Summary💎
▶︎All purchasers
・Original microfiber cloth (Peridot from pallasite pattern) 1 sheet
*Limited quantity / will change to a different pattern once the maximum quantity is reached.
▶︎Purchases of 3,000 yen or more
・Special patch 1 piece
(Shimizu Kiseki cut or Koshu Kiseki Kiriko
・Peridot (round, approx. 3.5mm) 1 stone
・Synthetic Cobalt Spinel 1 stone
・Apatite 1 stone
・Fluorite rough 1 stone
(Total 4 stones + patch)
・Spinel (Sanjey cut) 1 stone
・Peridot 1 stone
・Yellow Diamond 1 stone
・Vietnam-origin Cobalt Spinel rough 1 stone
(Total 4 stones)
▶︎Purchases of 60,000 yen or more
・Myanmar Red Spinel 1 stone
・Tanzanian Mahenge Spinel (small) 1 stone
・Blue/Gray Spinel 1 stone
・Illusion Sunstone (Mirage Flower Cut) 1 stone
・Spinel Rough 1 stone
・Yellow Quartz Rough 1 stone
*Ends when the maximum quantity is reached
【Bonus】
・Ring image holder
(Yellow gold color or silver color)
*Ends when the maximum quantity is reached / Color cannot be chosen
(Total 6 stones + bonus)
▶︎Purchases of 120,000 yen or more
・Tanzanian Mahenge Spinel (large) 1 stone
・Myanmar Spinel rough 1 stone
・Chinese Peridot (Star Cut) 1 stone
・Sunstone (Sanjey Cut) 1 stone
・YAG (Sanjey Cut) 1 stone
・Tanzanian Kornerupine 1 stone
・Madagascar Grandidierite 1 stone
・Tibetan Andesine rough 1 stone
【Bonus】
・1 in 2 chance of Peridot rough 1 stone
(Total 8 stones + 1 in 2 bonus)
▶︎Purchases of 200,000 yen or more
・Vietnamese or Tanzanian Color-Shift Cobalt Spinel (with identification certificate) 1 stone
・Shimizu Kiseki Sakura In-cut or Dandelion Cut Andesine 1 stone
(Total 2 stones)
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■□■Important Notes■□■
・The eligibility period is Saturday, August 8, 2026, 0:00 - Sunday, August 16, 2026, 23:59.
・Shipments for items purchased during the above period will begin sequentially around Thursday, August 20, but may be delayed compared to usual. Additionally, shipments are closed on weekends and holidays. We appreciate your understanding. We hope you look forward to receiving your items.
・Stones cannot be chosen as they are left to our discretion. Please understand that we cannot accommodate requests.
・The photos of the prize items are examples.
・The cut and color of the prize items may change without prior notice.
・Quality certificates are not included with prize items.
・Identification is performed for prize items.
・Prize items will be shipped together with your purchased items.(Pre-order items, custom-made jewelry, etc., will be shipped separately.)
・If you use a set discount or coupon discount, the total amount will be the amount after the discount.