Comparison

Gemstone Identifier º vs Marble

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gemstone Identifier º

Instantly identify gemstones, rocks, and minerals from a photo. Discover their value, history, care instructions, and authenticity. Chat with an AI expert and manage your collection.

Highlights
  • Identify stones by photo
  • Estimate stone value
  • Detect fakes
  • Detailed stone facts
  • AI gem expert chat
  • Collection management
  • Metal detector
Features
Read full description

Snap a photo of a gem, rock, crystal or mineral and find out what it is in seconds, with its value, its story and how to care for it. IDENTIFY ANY STONE • Point your camera or pick a photo from your gallery • Get the most likely match with a confidence score, plus look-alikes to compare • Three scan modes: Identify, Value and Real or fake • Snap tips help you take a clear, sharp shot KNOW WHAT IT'S WORTH • An estimate for your own specimen, in your currency • Market price ranges by size and quality • What drives the price, plus rarity, popularity and beauty scores SPOT FAKES BEFORE YOU BUY • A verdict on your photo, with the visible clues behind it • Common imitations and how to tell them apart • Simple home tests you can do safely EVERY DETAIL, DECODED • Key facts: Mohs hardness, chemical formula, crystal system, luster, specific gravity and more • How it formed, how old it is and where it is found • Varieties and look-alikes • Care guide: durability, cleaning steps, storage and what to avoid • Traditions and meanings if you want them: birthstones, zodiac, chakras, clearly labeled as cultural beliefs ASK A GEM EXPERT • Chat with an AI gem expert about any stone: value, care, authenticity or history • Ready-made questions to get started, answers in seconds YOUR COLLECTION • Every scan is saved in your history • Keep your favorite finds in My stones and your dream stones in a wishlist • Add notes: where you found it, what you paid, its weight • Share a specimen label card FREE TO EXPLORE • An encyclopedia of 60 gems, crystals, rocks and fossils with full profiles • Popular gems, real vs fake, birthstones by month, zodiac stones, crystals and traditions, tumbled stones • Practical guides and a stone of the day • A metal detector that uses your phone's magnetic sensor PREMIUM Identification, value estimates, real-or-fake checks and the gem expert are part of Premium (fair use applies). The price and billing period are shown in the app before you subscribe. Payment is charged to your Apple ID. The subscription renews automatically unless it is canceled at least 24 hours before the end of the period. Manage or cancel it anytime in your App Store account settings. GOOD TO KNOW Results come from an AI analysis of your photo and are indicative. For buying, selling or insurance, ask a certified gemologist or a gem lab. Value estimates are not financial advice, and cultural meanings are not medical claims. No account needed. Available in 11 languages. Terms of Use: https://qualitechnologies.com/terms-of-use Privacy Policy: https://qualitechnologies.com/privacy-policy

About

Marble

Transform photos or text into explorable 3D worlds. Step inside your creations, from real places to imaginary landscapes, without complex software or VR headsets. Share your immersive scenes with friends.

Highlights
  • Generate 3D worlds from single photos
  • Create scenes from text descriptions
  • Explore worlds by panning, orbiting, and stepping
  • No modeling software or VR headset required
  • Save and revisit created worlds
  • Share scenes with friends
Features
Read full description

Marble builds a 3D world from a single photo or a short line of text, then lets you move through it like a real place. Point it at a snapshot of a beach, type a sentence about a quiet mountain town, and a few seconds later you are standing inside it, free to look around. The idea is simple. You describe a place or upload an image, Marble works out the space behind it, and you get a scene you can pan, orbit and step into. There is no modeling software to learn, no headset to buy, and none of the usual friction that comes with making anything in 3D. People reach for it in very different ways. Some rebuild places they remember and want to visit again. Some block out imaginary settings for a story, a game or a mood board. Others just like watching an ordinary photo turn into somewhere they can actually explore. It handles calm landscapes, dreamlike scenery, fantasy settings and sci fi environments with the same ease. Every world you make stays yours. Keep the ones you love, open them again whenever you want, and send a scene to a friend so they can wander through it on their own. If you have ever wanted to step inside a picture instead of only looking at it, that is the whole point of Marble. Start with one photo or one sentence, and see where it takes you. Apple Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Gemstone Identifier º4 screens
Marble4 screens

Verdict

The call

The clearest difference is rating: Gemstone Identifier º at 4.2 against Marble's 1.0. Gemstone Identifier º also leads on ratings volume (13 vs 1) and iOS requirement (15.0 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Gemstone Identifier º sells 2 in-app purchases, starting at $6.99 per 7 days and Marble sells 5 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Gemstone Identifier º holds the better App Store score, 4.2 against 1.0. That said, the two scores are not equally well evidenced: Gemstone Identifier º has 13 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Gemstone Identifier º ships an update every 5 months, Marble every 3 months. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Gemstone Identifier º versus Marble: the parameters behind the verdict, then further details
ParameterGemstone Identifier ºMarble
PriceFreeFree
Rating4.2 (13 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings13 — better1
Update frequencyEvery 5 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size64 MB63 MB
Age rating4+4+
DeveloperQualitechnologies LLCEMINE ALTINTOP

Customer experience

Gemstone Identifier º

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Marble

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

2 purchases

Gemstone Identifier º

Subscriptions2
  • Weekly$6.997 Days
  • Gemstone Identifier Premium$34.991 Year
5 purchases

Marble

Subscriptions2
  • Marble Weekly7 Days trial$9.997 Days
  • Marble Yearly$69.991 Year
One-time3
  • Marble Credits$9.99
  • Marble Credits$19.99
  • Marble Credits$29.99

Questions

Is Gemstone Identifier º free?
Gemstone Identifier º is free to download, with in-app purchases available.
Is Marble free?
Marble is free to download, with in-app purchases available.
Which has better reviews, Gemstone Identifier º or Marble?
Gemstone Identifier º is rated higher. Gemstone Identifier º averages 4.2 out of 5 from 13 ratings, while Marble averages 1.0 from 1 ratings.
Do Gemstone Identifier º or Marble have ads?
Neither Gemstone Identifier º nor Marble shows ads.
Which is updated more often, Gemstone Identifier º or Marble?
Gemstone Identifier º ships an update every 5 months, and Marble every 3 months. Most recently, Gemstone Identifier º was updated on November 5, 2026 and Marble on October 31, 2026.

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