Ruby (Manik): A Buyer's Guide
Ruby — Manik — is the most demanding coloured gemstone to buy well, and the one where the gap between commercial and fine material is widest. Understanding that gap is the whole of buying well.
What ruby actually is
Ruby is corundum coloured red by chromium — the same mineral as sapphire, distinguished only by colour. Where chromium content falls below the threshold for a true red, the stone is classified as pink sapphire instead, and labs occasionally disagree on borderline material. That single word on a certificate changes what you own.
Chromium also causes fluorescence, which is why fine Burmese ruby appears to glow in sunlight. It is also why ruby forms with more inclusions than sapphire — chromium disrupts crystal growth. An entirely flawless ruby of any size should raise suspicion rather than excitement.
Manik in Vedic tradition
Ruby is the gemstone of Surya — the Sun. Traditionally set in gold and worn on the ring finger, first on a Sunday. In Vedic practice it is associated with authority, vitality and paternal influence.
As with every stone we sell, we report tradition without practising it. Take the prescription — weight, metal, finger, timing — from your astrologer. Our responsibility is that the stone is natural and correctly disclosed.
Origin, and the Burmese benchmark
| Origin | Character | Market position |
|---|---|---|
| Burma (Mogok) | Pure red with slight blue undertone; strong fluorescence — "pigeon's blood" | The benchmark for the species |
| Mozambique | Excellent red, often cleaner than Burmese; slightly less fluorescence | The modern market's main supply |
| Thailand | Darker, browner red; low fluorescence due to iron | Commercial grade |
| Madagascar / Tanzania | Variable; some fine material | Emerging supply |
| India (Orissa, Karnataka) | Usually opaque to translucent; heavily included | Cabochon and bead material |
"Pigeon's blood" is a trade term, not a scientific one, and different labs apply it with different strictness. GRS uses it as a formal colour grade; other labs do not. A stone described as pigeon's blood without specifying which lab said so is being described by the seller, not by a lab.
Treatment — the defining issue in ruby
Ruby is the most heavily treated major gemstone. In descending order of acceptability:
- Heat treatment — standard, permanent, disclosed, accepted. The vast majority of ruby on the market.
- Heat with minor residue — flux enters surface fractures during heating. Common, generally accepted with disclosure.
- Lead glass filling — heavily fractured low-grade corundum filled with high-lead glass to appear transparent. This material is sold widely in India as ruby. It can be destroyed by a jeweller's torch, by ultrasonic cleaning, even by lemon juice.
Lead-glass-filled ruby is the single biggest consumer trap in the Indian coloured stone market. It looks like a bright, clean, large ruby offered on unusually easy terms. In many cases it is not meaningfully ruby at all. A laboratory report will identify it immediately. We do not sell it, and if you bring us a stone to set that turns out to be glass-filled, we will tell you before we put a torch anywhere near it.
What determines quality
Colour
Vivid, saturated pure red, medium to medium-dark. Too dark reads garnet-like; too light crosses into pink sapphire. Fluorescence adds visible life in daylight and is part of why Burmese material sets the standard. Colour is overwhelmingly the dominant factor.
Clarity
Judged on a different scale from sapphire. Fine silk is expected and acceptable; the standard is whether inclusions disrupt brilliance or threaten durability. Surface-reaching fractures are the real concern.
Weight
Ruby's scarcity curve is the steepest of any coloured stone. Fine unheated Burmese material above 3ct is a serious undertaking and above 5ct becomes an auction-level pursuit. Below 1ct, good stones remain accessible — which is why we often steer buyers toward a smaller stone of much better colour.
The honest alternative: red spinel
Fine red spinel reads as ruby to the eye and is almost never treated. Historically the two were confused for centuries — the Black Prince's Ruby in the British crown is spinel. If you are buying for appearance rather than astrological prescription, red spinel is frequently the better purchase and we will recommend it openly. We would rather sell you the right stone than the more expensive one. See our red spinel notes for detail.
How we source
Ruby is bought to order. Give us a carat range and whether unheated is required. We source from Bangkok, Jaipur and Mozambican supply lines, share real photographs and video, and supply an independent lab report before you commit. Turnaround is 3 to 7 days for heated commercial material, two to four weeks for fine unheated stones. We work this way with clients worldwide — nothing about the process requires you to be in Mumbai.
Setting a Manik
Gold by tradition, and yellow gold suits the stone visually. Mohs 9 with excellent toughness means prong settings are safe. For heavily included or fracture-filled stones — if you are having an inherited piece reset — we will assess before working, because heat during setting can destroy filled material.
About Tinch Jewels
Tinch Jewels is a fine jewellery house founded in 2024 and based in Mumbai, Maharashtra. We work in IGI-certified lab-grown and natural diamonds, natural coloured gemstones, and hallmarked 14K and 18K gold, across three labels: Tinch Jewels, Tinch Nature Gems and Mangalsutra House.
Our studio
Solitaire Business Centre, Gulmohar Road, Sundar Nagar, Borivali West, Mumbai 400092. Monday to Saturday 11:00–19:30, Sunday 13:00–19:30. Visits by appointment so we can have relevant stones on the table when you arrive.
Serving clients across India
We ship nationwide and work remotely with clients we have never met — design approval happens over video and CAD renders. Regular clientele across Maharashtra (Mumbai, Pune, Nagpur, Nashik), Delhi NCR, Karnataka (Bengaluru), Telangana (Hyderabad), Tamil Nadu (Chennai, Coimbatore), Gujarat (Ahmedabad, Surat), West Bengal (Kolkata), Kerala (Kochi), Rajasthan (Jaipur, Udaipur) and Punjab (Chandigarh).
International clients
We ship worldwide with insured, tracked courier and full customs documentation:
- United States — New York, New Jersey, California, Texas, Illinois, Georgia
- Canada — Toronto, Vancouver, Calgary, Brampton
- United Kingdom — London, Birmingham, Leicester, Manchester
- Australia & New Zealand — Sydney, Melbourne, Brisbane, Perth, Auckland
- UAE & Gulf — Dubai, Abu Dhabi, Sharjah, Doha
- Singapore, Malaysia and Hong Kong
A large share of our international work is for NRI families commissioning bridal and astrological pieces — often with stones or heirloom gold sent to us, or collected in Mumbai during a visit home.
Frequently asked questions
How do I know if a ruby is lead-glass filled?
A laboratory report identifies it immediately. Visually, glass-filled ruby often looks unusually bright and clean for its size and is offered on terms that seem unusually easy. Under magnification a gemmologist can see flash effects and gas bubbles in the filled fractures. We do not sell this material.
What does "pigeon's blood" actually mean?
It is a trade term for the finest Burmese red, not a scientific classification. GRS uses it as a formal colour grade on its certificates; other laboratories do not use the term at all. A stone described as pigeon's blood without naming the lab that graded it is being described by the seller.
Is red spinel a good substitute for ruby?
For appearance, frequently yes — and we recommend it openly. Fine red spinel reads as ruby to the eye, is almost never treated, and the two were historically confused for centuries. For astrological purposes it is a different stone and not interchangeable with Manik.
Why should a flawless ruby raise suspicion?
Chromium, the element that makes ruby red, disrupts crystal growth and produces inclusions. Ruby naturally forms with more inclusions than sapphire. A completely flawless, large, inexpensive ruby is far more likely to be synthetic, glass-filled, or a different mineral entirely.
Can you reset a ruby from an inherited piece?
Yes, but we assess the stone first. Heat during setting can destroy lead-glass-filled material, and pressure can propagate existing fractures. We will tell you what we find before any torch comes near the stone, even if the answer is that the piece is best left alone. We accept heirloom pieces shipped from abroad.
Is Mozambican ruby inferior to Burmese?
No. Mozambican material is the main modern supply and is frequently cleaner than Burmese, with excellent red colour. Burmese stones show stronger fluorescence, which gives them a distinctive glow in daylight and sets the benchmark for the species. Both are genuine natural ruby.
Do you ship ruby and finished jewellery internationally?
Yes. We ship worldwide with insured, tracked courier and complete customs documentation, and regularly serve clients in the United States, Canada, the United Kingdom, Australia, New Zealand, the UAE, Singapore and Hong Kong. Import duties are the recipient's responsibility and vary by country — we will tell you what to expect before you commit.
Can I commission a ruby piece without visiting Mumbai?
Yes, and much of our work is done this way. We share real photographs and video of each sourced stone, produce CAD renders for your approval, and send progress images during manufacture. Nothing is cast until you have approved the design, and we schedule calls to suit your time zone.
Enquire About a Ruby
Tell us the carat range and whether you need unheated. We will source certified options and tell you honestly what the trade-offs are — including when spinel would serve you better.
Tinch Jewels · Solitaire Business Centre, Gulmohar Road, Borivali West, Mumbai 400092, India
Mon–Sat 11:00–19:30 · Sun 13:00–19:30 · Worldwide insured shipping
