Navneet is friendly and was continuously communicative during the entire experience when ordering online. I received my order, and it was more than I could have hoped for. My ring is stunning, and the... See more
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I have now made 3 purchases. Buying expensive gemstones is always nerve wracking. I got them tested at my local jeweler when I got them- they are authentic. The customer service is excellent. The ship... See more
Item said it was in transit for almost a month. Only update received was from UPS saying it arrived in Goodyear AZ (155 miles from destination) and UPS kept sending “shipment delayed due to conflict”.... See more
Company replied
Navneet was incredible helpful. I received a diamond that was very close to what I ordered, but it had a chip in it. Navneet did everything he could to get me a replacement that was an upgrade from... See more
Company details
Written by the company
Welcome, we are Black Diamond our Business name is Black Diamond, and Based in Surat, India, We cut and polished loose natural diamonds all fancy shape all colors all size all fancy shapes and raw natural diamonds of all fancy colors all sizes, rustic rose cut diamonds, white rose cut, white star melee, black, blue, green, cognac, pink, purple, salt, and pepper all shapes rose cut, Diamond beads, raw crystal diamonds, raw mackle, diamond slice also offering fancy color GIA/IGI/HRD Certified diamonds, and custom jewelry as per request all diamonds are conflicts free and Kimberley Licensees, we have a responsibility to maintain the highest standards when sourcing our diamonds. We source our rough only from Kimberley Process-compliant nations and send them to our certified fair trade facility to be polished. We are 100% committed to ethical sourcing as our best practice, thank you for visiting our store.
Contact info
202, Sardar center, Hiranagar, A.K Road, 395006, Surat, India
- +91 9099720491
- Hello@blackdiamond.onl
- blackdiamond.onl
4.5
Excellent
23 reviews
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Exquisite!
Navneet is friendly and was continuously communicative during the entire experience when ordering online. I received my order, and it was more than I could have hoped for. My ring is stunning, and the diamond is so radiant! My appreciation is extended to the craftsman, as the entire piece is a work of art! Thank you, Blackdiamond!
13 October 2026
Unprompted review
3 purchases to perfection
I have now made 3 purchases. Buying expensive gemstones is always nerve wracking. I got them tested at my local jeweler when I got them- they are authentic. The customer service is excellent. The shipping was seamless. We are having custom rings made for our wedding and the bulk of my gems have come from this store. We even purchased one that was too small and getting that fixed was not only easy, they worked with me to get the PERFECT one. I will be a forever customer. You cannot beat the price, customer service, and quality of stones. I am full of gratitude for finding this gem! 10/10 recommend !
3 October 2026
Unprompted review
Delivery time
Item said it was in transit for almost a month. Only update received was from UPS saying it arrived in Goodyear AZ (155 miles from destination) and UPS kept sending “shipment delayed due to conflict”. Unfortunately item didn’t make it by requested time.
25 July 2026
Reply from Black Diamond Onl
Our standard production time for a two-band ring is 1–14 days, followed by approximately 7–8 days for delivery. Since your ring includes two bands, we needed to carefully work on every detail and pay close attention to the craftsmanship to ensure we deliver a high-quality, beautiful masterpiece.
I sincerely apologize for the delay and for the inconvenience caused. I also apologize on behalf of UPS for the unexpected shipping delay. Thank you very much for your patience and understanding.
Best regards,
Navneet
Excellent services and prompt responses
Excellent services and prompt responses
Quality , trust , and transparency sources
highly recommended
6 July 2026
Unprompted review
They had just what I needed
They had just what I needed for a project. They shipped quickly and the stones look great. I'll definitely come back if I need more black diamonds
23 June 2026
Reply from Black Diamond Onl
Thank you very much for your valuable feedback. We truly appreciate your support and look forward to working with you again in the future. Best wishes, Navneet
Navneet was incredible helpful
Navneet was incredible helpful. I received a diamond that was very close to what I ordered, but it had a chip in it. Navneet did everything he could to get me a replacement that was an upgrade from what I originally purchased to make up for it. He also expedited the shipping.
Couldn’t recommend this place enough, as I was a little worried about an online store that I had never heard of.
4 May 2026
Unprompted review
Lovely Stones
Beautiful stones, arrived as stated, high chance I will be a repeat customer.
Shipping took a while but having a tracking number gave peace of mind.
21 April 2026
This is my third purchase and look…
This is my third purchase and look forward to many more! A+
9 April 2026
Reply from Black Diamond Onl
Thank you so much for your continued support! It truly means a lot to us that this is your third purchase. We’re thrilled you’re happy, and we look forward to serving you again very soon. A+ customers like you make our work even more special!
Absolutely love the ring!
Absolutely love the ring!! Took a minute to get it and got a little nervous for a bit but this kind of custom quality is sooooo worth the wait. When I get another black diamond piece of jewelry, I know where I’m going to go.
21 November 2025
Reply from Black Diamond Onl
Thank you so much! I really appreciate your patience, I know the wait can feel a bit long sometimes, but we were busy creating something truly special for you. I’m so glad it was worth it in the end and that you love the ring.
Whenever you’re ready for your next black diamond piece, I’ll be here 😊
This is the second time I am using…
This is the second time I am using their services for custom piece jewelry! Navneet as always is a delight to work with. He is clear with his communication and the work is mind blowing for very reasonable prices! Also one the best part it’s the ease of payment being abroad! Highly highly recommend!
10 March 2026
Unprompted review
Variety, service and now a loyal customer
I was really pleased with the variety of stones in sizes, cuts and colors. Shipping and delivery was on time and they had a speedy reply from their customer service mail. I’m looking forward to designing a unique ring with my stones and will definitely be back for more rings and stones in the future
2 March 2026
Unprompted review
Reply from Black Diamond Onl
Thank you so much! I am really happy you liked the variety, it’s something I put a lot of effort into so everyone can find something special. Glad to hear everything went smoothly with shipping and communication too.
It’s exciting that you’re planning to design your own ring, that’s the best part. I’ll be here whenever you’re ready for your next piece 😊
Kind regards,
Navneet
Loved it !!!!!!!!!!!
14 October 2025
Reply from Black Diamond Onl
Thank you very much sir for your valuable feedback, Kind regards Navneet
Nice diamonds for a sufficient price
Nice diamonds for a sufficient price. Quickly arrived.
10 October 2025
Reply from Black Diamond Onl
Thank you very much for your valuable feedback, AAA+ buyer excellent communication Kind regards, Navneet
Soooo beautiful
The quality in the price of these diamonds blew my mind. I will definitely be buying a lot more for my custom-made jewelry.
13 August 2025
Reply from Black Diamond Onl
Your feedback truly made our day! Thank you for choosing us, we can’t wait to serve you again.
Best wishes
Navneet
Highly Recommend
The process was simple and honestly made purchasing a wedding ring seem almost too easy. I may have missed something in the online purchase info but I could find no mention of the preparation time involved before the expedited shipping occured. Therefore, I was expecting to receive the ring in a week or so. Instead of the actual 3 weeks it took. Overall a great experience and highly recommend!
12 July 2025
Reply from Black Diamond Onl
Thank you so much for your kind words and recommendation it truly means a lot to us! 😊
We’re so glad the overall process felt simple and easy for you. Just to share a little behind the scenes your order included both an engagement ring and a wedding band, and we wanted to make sure every detail, especially on the engagement ring, was absolutely perfect. That extra time allowed us to double-check the craftsmanship and quality, which is something we never compromise on.
We always prioritize quality over speed, and we appreciate your patience and understanding. Wishing you a lifetime of love and happiness and thank you again for trusting us with such a special moment! 💍✨
Best Wishes
Navneet
On time and available...
On time and available...No one else has this dimension of Black Diamond Baguette.
16 July 2025
Reply from Black Diamond Onl
We are proud to specialize in natural black diamonds, precisely calibrated in a variety of shapes, and we’re dedicated to supporting fine custom and bespoke jewelry creators.
Thank you for placing your trust in us. We truly value your business and look forward to serving you again in the future.
Warm regards,
Navneet
Amazing Customer Service
Customer service was very quick to answer and respond. They were very clear and helpful. Pleased with my experience.
12 May 2025
Unprompted review
Reply from Black Diamond Onl
Thank you! I’m happy I could support you and make your experience a good one. Always here if you need further assistance Best wishes Navneet!
Really good service
Really good service. Answered emails within seconds, delivery was extremely quick to the UK. Thanks guys
1 May 2025
Reply from Black Diamond Onl
Thank you so much sir for your kind words! We’re thrilled to hear you were happy with our quick responses and fast delivery to the London, UK. Your support means a lot to us—thanks again! Navneet
Great experience
Great experience, fantastic communication and delivery. Cheers from JW.
30 April 2025
Unprompted review
Reply from Black Diamond Onl
Thank you so much, Sir. We are glad you had a great experience. Really appreciate your kind word. cheers from Navneet.
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