Stone Algo
A bootstrapped, profitable startup likened to Kayak for diamonds that successfully raised capital.
First Mentioned
8/1/2026, 7:11:47 AM
Last Updated
8/1/2026, 7:13:11 AM
Research Retrieved
8/1/2026, 7:13:11 AM
Summary
Stone Algo (StoneAlgo, Inc.) is a bootstrapped startup operating an online diamond search and comparison marketplace headquartered in New York, NY. The platform utilizes proprietary machine learning algorithms to provide cut quality scores, price estimates, and side-by-side diamond comparisons across online diamond retailers. In the context of market shifts away from cash-burning venture capital funding models, Stone Algo serves as a primary example of a company adopting a self-sustaining "Default Alive" mindset and private equity approach to startup growth.
Referenced in 1 Document
Research Data
Extracted Attributes
Industry
Diamond Search & Comparison Marketplace
Headquarters
New York, NY, United States
Key Features
Cut Quality Score, Diamond Price Estimates, Smart Search
Operating Model
Bootstrapped Startup
Operational Mindset
Default Alive
Timeline
- StoneAlgo claimed its company profile on Trustpilot and expanded online presence. (Source: Trustpilot Web Search Result)
2018-03-01
Wikipedia
View on WikipediaAlgo Mágico
"Algo Mágico" (transl. "Something Magical") is a song recorded by Puerto Rican singer Rauw Alejandro for his debut studio album, Afrodisíaco (2020). The song was written by Mr. NaisGai, Alejandro, Jesus D. Valencia, Miky, Maiky, Elektrik, Maya, Sinatra, Colla, Eric Duars, while the production was handled by Elektrik, Mr. Naisgai, Maya, Sinatra, Miky, Maiky, and Caleb Calloway. It was released for digital download and streaming by Sony Music Latin and Duars Entertainment on June 25, 2020, as the second promotional single from the album. A Spanish language contemporary pop and electronic house song, it is "an oath to inner beauty and unconditional love", meant to be dedicated to someone special. "Algo Mágico" received positive reviews from music critics, who complimented its fusion of genres and sounds. The song peaked at numbers 69 and 100 in Spain and Argentina, respectively, and was certified diamond + platinum in Mexico. An accompanying fanciful animated music video, released simultaneously with the song, was directed by Sebastián Mejia. The visual depicts two masked people traveling the world on a dragon, as they get to know each other deeply and unmask their feelings. It won the award for Best Animated Video at the 2020 Noise Colectivo Awards. A remix by Dutch-Moroccan producer R3hab was released on March 11, 2021, which was accompanied by another animated music video.
Web Search Results
- Frequently Asked Questions
Machine Learning is designed to optimize problems which are not obvious or not solvable by human deduction alone (or we can't do it fast enough to make it worth the effort). StoneAlgo prioritizes the integrity of our data and the values the algorithm outputs over any other factor when recommending diamonds to you on our platform. The Cut Score and Price Score metrics are the drivers behind the diamonds you will see. We have spent an incredible amount of our time working on the algorithm and ensuring the output is something you can trust and therefore use as a tool when comparing diamonds. [...] You can always ask us a question using the messaging system at the bottom right of this page. However, if you'd like to do some additional reading you can head over to our blog section where we provide great content for getting you up to speed. If there are any additional questions you have please feel free to send us an email at any time to management@stonealgo.com or open up the chat window and let's talk. StoneAlgo Logo The world's largest diamond marketplace. #### Features #### Prices #### More #### Company © 2026 StoneAlgo, Inc. All rights reserved. [...] No. We will put our algorithm to work for you to find the perfect diamond with the best value within your budget. Once you find the perfect diamond you can click any of the indicated links to the retailer's website where you will finalize the purchase. In certain cases, StoneAlgo will earn a fee from the online diamond dealer for having referred you to their site. We have a more detailed answer to this question on our retailers page. But in general these are online diamond dealers that we've vetted to maintain excellent reviews on Google, Yelp, WeddingWire etc. as well as uphold certain standards in business in general reflected by their Better Business Bureau rating.
- StoneAlgo is rated "Excellent" with 4.8 / 5 on Trustpilot
### Written by the company StoneAlgo is a diamond search & comparison site. Use our cut quality score & price estimates to easily find the most undervalued diamonds available in the market today. ## Contact info New York, NY, United States management@stonealgo.com www.stonealgo.com 4.8 ### Excellent Image 10: Rated 5 out of 5 stars 57 reviews 5-star 4-star 3-star 2-star 1-star How is the TrustScore calculated? No recent history of asking for reviews This company hasn't invited customers recently, so reviews may not be representative How this company uses Trustpilot See how their reviews and ratings are sourced, scored, and moderated. ## People also looked at [...] Image 1: Trustpilot reviews #### Suggested companies #### Wedding Weekender wedding-weekender.com•94 reviews #### 4.9#### Ethical Trade Co ethicaltradeco.com•30 reviews #### 4.7#### My Wedding Reception Ideas myweddingreceptionideas.com•47 reviews #### 4.7 #### Suggested searches Game store in New YorkElectronics store near meWomens clothing store in United StatesBest website designerTravel agency in Chicago CategoriesBlogLog inFor businesses For businesses Log inCategoriesBlog 2. Events & Entertainment 3. Wedding & Party 4. Wedding Service 5. StoneAlgo Summary About Reviews Visit websiteWrite a review Image 2: StoneAlgo logo Visit website Claimed profile•March 2018 # StoneAlgo Reviews 57 • Image 3: Rated 5 out of 5 stars 4.8 Wedding Service [...] October 12, 2021 Unprompted review Useful Share MD mary D CA•2 reviews Oct 8, 2021 Image 54: Rated 5 out of 5 stars ## this site is awesome this site is awesome. The co-founders have helped me on more than one occasion through the chat option. They were so nice and honest. They helped and gave me advice on 2 stones I was considering. Their advice and opinions are unbiased and you can tell they generally really just want to help with no ulterior motives. Highly recommended. I love the free diamond check. October 8, 2021 Unprompted review Useful Share Image 55: StoneAlgo logo Reply from StoneAlgo Oct 11, 2021 Thanks for the awesome review Mary! It was a pleasure helping you with your search GW Gwen US•3 reviews Aug 31, 2021 Image 56: Rated 5 out of 5 stars
- The World's Largest Diamond Marketplace
### Find Great Deals We help you find underpriced, high quality stones. Our fair price estimate saves you time and money. ### Compare Diamonds Compare up to 4 diamonds at once and get expert analysis in a useful side by side view. ### Check For Red Flags Sometimes what looks like a great deal on paper is just too good to be true. ## Check Prices Track diamond prices with our historical price charts & proprietary diamond price indexes. ## Our Retailers Adiamor logo Daniel William logo DreamStone logo Friendly Diamonds logo Whiteflash logo With Clarity logo ## Highly Recommend StoneAlgo I am VERY grateful to StoneAlgo for saving me from a would-be terrible purchase. Highly recommend! ## StoneAlgo is a Tremendous Resource [...] ## StoneAlgo is a Tremendous Resource The cut score was a terrific way to hone in on the best candidates when faced with the overwhelming number of options available online. ## The Most Beautiful Diamond I’ve Ever Seen! By using the StoneAlgo calculator, I was able to find the best cut diamond at the best price. My diamond is breathtaking. Example of a diamond on hand on the day of engagement Example of a diamond on hand on vacation near water Example of a diamond on hand on vacation in Europe Example of a diamond on hand on vacation in cold weather ## See how over 1 million diamond shoppers saved money on StoneAlgo StoneAlgo Logo The world's largest diamond marketplace. #### Features #### Prices #### More #### Company © 2026 StoneAlgo, Inc. All rights reserved. [...] Diamond Checks ## Search diamonds by shape Search for diamonds with Round shape ## Round Search for diamonds with Cushion shape ## Cushion Search for diamonds with Oval shape ## Oval Search for diamonds with Princess shape ## Princess Search for diamonds with Emerald shape ## Emerald Search for diamonds with Pear shape ## Pear Search for diamonds with Radiant shape ## Radiant Search for diamonds with Asscher shape ## Asscher Search for diamonds with Marquise shape ## Marquise Search for diamonds with Heart shape ## Heart ## How StoneAlgo helps you buy better ### Smart Search StoneAlgo’s Smart Search will help you find the perfect diamond from over 2M stones. ### Find Great Deals
- Applications of artificial intelligence algorithms in ultrasound-based kidney stone detection, classification, prediction, and management: a systematic review - PubMed
### Authors ### Affiliations ## Abstract Background: Kidney stones are a prevalent urological condition with significant global burden, often diagnosed using ultrasound (US) as a first-line modality despite its limitations in sensitivity and operator dependency. Artificial intelligence (AI) and deep learning (DL) algorithms have shown promise in enhancing US-based kidney stone applications, including detection, classification, complication prediction, and procedural guidance, but evidence remains heterogeneous. Objective: To systematically review and synthesize the applications of AI and DL algorithms in US-based kidney stone detection, classification, prediction of complications/outcomes, and procedural guidance. [...] Methods: This systematic review followed PRISMA guidelines (PROSPERO: CRD420251247650). Databases including PubMed, Embase, Scopus, and others were searched from inception without language restrictions. Eligible studies were original peer-reviewed articles evaluating AI/DL in US for kidney stone diagnostics against reference standards like CT or surgical findings. Two reviewers independently screened, extracted data, and assessed quality using QUADAS-2 with AI extensions. [...] Springer full text link NCBI Literature Resources MeSH PMC Bookshelf Disclaimer The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). Unauthorized use of these marks is strictly prohibited. Connect with NLM National Library of Medicine 8600 Rockville Pike Bethesda, MD 20894 Web Policies FOIA HHS Vulnerability Disclosure Help Accessibility Careers
- [PDF] Prefix Sums and Their Applications
Ofman, Y., On the Algorithmic Complexity of Discrete Functions. Soviet Physics Doklady, 7(7):589–591, January 1963. Schwartz, J.T., Ultracomputers. ACM Transactions on Programming Languages and Systems, 2(4):484–521, October 1980. Stone, H.S., Parallel Processsing with the Perfect Shuffle. IEEE Transactions on Computers, C-20(2):153–161, 1971. Stone, H.S., An Efficient Parallel Algorithm for the Solution of a Tridiagonal Linear System of Equations. Journal of the Association for Computing Machinery, 20(1):27–38, January 1973. Stone, H.S., Parallel Tridiagonal Equation Solvers. ACM Transactions on Mathe-matical Software, 1(4):289–307, December 1975. [...] 1.16 Design an algorithm that given the radius and number of sides on a regular polygon, determines all the pixels that outline the polygon. Notes and References The all-prefix-sums operation has been around for centuries as the recur-rence xi = ai +xi−1. A parallel circuit to execute the scan operation was first suggested by Ofman (1963) for the addition of binary numbers. A parallel implementation of scans on a perfect shuffle network was later suggested by Stone (1971) for polynomial evaluation. The optimal algorithm discussed in Section 1.2 is a slight variation of algorithms suggested by Kogge and Stone (1973) and by Stone (1975) in the context of recurrence equations. [...] The line-of-sight and radix-sort algorithms are discussed by Blelloch (1988, 1990). The parallel solution of recurrence problems was first discussed by Karp, Miller and Winograd (1967), and parallel algorithms to solve them are given by Kogge and Stone (1973), Stone (1973, 1975) and Chen and Kuck (1975). Hyafil and Kung (1977) show that the complexity (1.10) is a lower bound. Schwartz (1980) and, independently, Mago (1979) first suggested the segmented versions of the scans. Blelloch (1990) suggested many uses of these scans including the quicksort algorithm and the line-drawing algorithm presented in Sections 1 and 1. I would like to thank Siddhartha Chatterjee, Jonathan Hardwick and Jay Sipelstein for reading over drafts of this chapter.