
Have your crystals and eat them too.
They say diamonds are forever but besides their famous hardness, it’s our fascination with gems, crystals, and other minerals that never seems to cease. Their often glittering geometric beauty crafted by nature over periods of time that sometimes stretch into eons has captivated our imaginations throughout human history.
And now we can eat them too!
Not the actual crystals of course, but Usagi no Nedoko, a lifestyle goods and dessert maker in Tokyo and Kyoto, has crafted a set of cakes that look a lot like the real things. Called Crystal Rock Cake (Kessho Rock Cake), each cake resembles a type of crystal embedded in rock.
▼ They come in a very classy box too.
It’s also a play on conventional rock cakes, which are a crumbly type of cake from Britain similar to a scone. When you open up the box you’ll find each cake individually boxed like geological samples.
▼ Clockwise from top left: Fluorite, Apatite, Amethyst, Garnet, Lazulite
The gemstone parts are each made from pâte de fruits, a chewy and sweet French confection made from a fruit flavored jelly paste. In addition to having a delectable taste and texture, they also have just the right kind of sheen to resemble a real crystal.
Our writer Natsuki Gojo bought a box for 2,160 yen (US$15) and tried each one out, starting with the Fluorite. This was a mint-flavored candy atop a dark chocolate rock cake for a more mature flavor.
Next, the Apatite was made from an apple-flavored pâte de fruits on a rock cake with a firm aroma of black tea. This cake would go quite well with a real cup of tea on a relaxing afternoon.
The Lazulite uses a plain rock cake to really bring out the unique look and flavor of the bright blue gemstone topping. This is flavored with blue curaçao, a Dutch distilled liquor made with the citrusy scent of laraha peels.
The mango-flavored Garnet topping is interestingly matched up with a very aromatic rock cake that contains black sesame. The two tastes went together much better than Natsuki expected.
Her favorite one was Amethyst, mostly because the pale purple color reminded her of the actual stone. It also had a mysteriously deep floral taste that she wasn’t familiar with but later learned was parfait d’amour.
The rock cake also has bits of almond in it for a slightly more rocky texture than the others.
For each cake there was an excellent balance of flavors and textures. In each case the gems themselves would have been too sweet and chewy, whereas the cakes would have been too plain and dry on their own. But together, they made perfect harmony.
For that reason alone they’re great, but their stunning visual presentation guarantees they’ll make the perfect souvenir or gift. Even if you can’t get out to Tokyo or Kyoto, Crystal Rock Cake can be purchased online from anywhere in Japan. Quantities are limited though, so act fast or you’ll be able to form your own amethyst waiting for them.
Source: Usagi no Nedoko
Photos ©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]










A real-world Pokémon Poké Ball hotel is opening in Japan at a still-secret location [Video]
Starbucks Japan reveals new Tsukimi Moon-Viewing drinkware and gifts for autumn 2026
Japan’s revolving sushi restaurant king Sushiro coming to U.S. this fall with high prices, no tipping
Japan’s first fall color forecast for 2026 is here!
The mystery of Port Store, the Japanese convenience store that looks like a Lawson rip-off
A real-world Pokémon Poké Ball hotel is opening in Japan at a still-secret location [Video]
Starbucks Japan reveals new Tsukimi Moon-Viewing drinkware and gifts for autumn 2026
Japan’s revolving sushi restaurant king Sushiro coming to U.S. this fall with high prices, no tipping
Japan’s first fall color forecast for 2026 is here!
The mystery of Port Store, the Japanese convenience store that looks like a Lawson rip-off
Elderly couple donates 400 million yen to erect Myaku-Myaku statue in Osaka
Tamagotchi evolves into a ring for its 30th anniversary, preorders now open
Japan Railways announces unlimited-ride train pass for fall travel
Lawson convenience store opens its first mobile, trailer-style location in Japan
Family Mart releases Famima convenience store products nationwide, but which ones are worth buying?
Japan’s final Penguin Suica train cards have already shipped, and when they’re gone, they’re gone
Studio Ghibli unveils new anime calendars and diary planners for 2027
Solo travel in Japan: Hidden beer garden in Tokyo is a haven for single visitors
Japan approves foreign resident visa renewal fee increases of up to 967 percent, starts soon
Farewell Final Ceremony announced for Tokyo’s life-size Gundam statue, will stream live
Hobonichi unveils new 2027 planners, diaries and stationery with One Piece, Suica Penguin, Hello Kitty and a must-buy Mini Techo
Family Mart releases new Human Made Cup Noodle in Japan, with freebies for Nigo fans
One Piece Day 2026 brings new art, music, and new cast announcements
Hikaru Utada sings new song in Shinkansen commercial for Japan’s Supreme Class cabins
Mister Donut releases new doughnuts that look and taste like Japanese sweet potatoes
12-year-old British girl who went missing in Tokyo found safe after visiting anime sites around Yokohama
7-year-old boy left behind on Mt. Fuji by his own dad
Sushi Bus: Japan’s first conveyor-belt bus lets you eat sushi while sightseeing around Tokyo
Pokémon Center Online designates first Pokémon items that will require Japanese ID card to buy
Japanese toilet aims to attract foreign tourists but not everybody is happy about it
New Japanese vending machine at Shinkansen station sells cups of ice on platform
Study finds hundreds of people in Indonesia legally named after Naruto, Inuyasha, other anime stars
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Tokyo subway installing new ticket gates that don’t accept payment through Suica or other IC cards
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Elderly couple donates 400 million yen to erect Myaku-Myaku statue in Osaka
Tamagotchi evolves into a ring for its 30th anniversary, preorders now open
Japan Railways announces unlimited-ride train pass for fall travel
Lawson convenience store opens its first mobile, trailer-style location in Japan
Family Mart releases Famima convenience store products nationwide, but which ones are worth buying?
Studio Ghibli unveils new anime calendars and diary planners for 2027
Hobonichi unveils new 2027 planners, diaries and stationery with One Piece, Suica Penguin, Hello Kitty and a must-buy Mini Techo
Onsen Egg Bukkake Udon Ice Cream makes us rethink everything we thought we knew about sweets
Mister Donut releases new doughnuts that look and taste like Japanese sweet potatoes
Finally! Japan’s big three convenience store chains announce rice ball price reductions
Mini CRT-lookalike Final Fantasy figurines are awesome pixel art music boxes [Video]
Japan’s most popular curry rice restaurant chain, Coco Ichibanya, might be for sale
One Piece Day 2026 brings new art, music, and new cast announcements
Amid foreign sex tourist rise, Japanese government considering outlawing paying for prostitution