Gemstone Buying Guide

Buy With Confidence

Gemstone Buying Guide for
Maximum Astrological Benefits

Colour, clarity, certification, weight — these four things separate a gemstone that works from one that doesn't. Here's how to tell the difference.
Start Here
Step by Step
How to Choose Your Gemstone
Four decisions to make, in order — each one narrows down what you're looking for.
1
Decide Gemstone Weight
Gemstone weight is measured in carat or ratti (1 carat ≈ 0.91 ratti). But bigger isn't always better — a smaller stone of excellent quality is generally more astrologically effective than a larger stone of poor quality. Your ideal weight also depends on your body weight and the planet's strength in your chart.
2
Set Your Budget
Two gemstones of the exact same size can sit at completely different price points — the gap comes down to quality factors like origin, colour, clarity and cut, not carat alone. Decide your budget first, then let our experts show you the best quality available within it.
3
Pick Your Stone
Choose your stone based on quality factors — colour and clarity matter most, alongside shape and cut. Oval, cushion, square, rectangular or emerald-cut all work astrologically; what matters is how well the cut shows off the stone's colour and clarity, and how comfortably it sits in your preferred setting.
4
Verify Astrological Suitability
Before you finalise your gemstone, confirm it carries a lab certificate — from GIA, IGI, IIGJ or an equivalent — verifying its natural origin and disclosing any treatment. That certificate is your independent proof the gemstone is exactly what it claims to be, and suitable for astrological wear.
THE SCIENCE BEHIND THE PRICE
Understanding Colour & Clarity
The two biggest factors behind a gemstone's price and astrological quality.
Gemstone colour grading chart — AAA to B

Gemstone Colour Grading

Colour is the single biggest factor in a gemstone's value — often more decisive than size. Coloured gemstones are graded AAA to B by rarity: AAA (finest, ~2% of stones), AA (~10%), A (~20%), B (~50%, commercial grade). For astrological wear specifically, a rich, even, well-saturated colour matters more than absolute size — a smaller stone with excellent colour will often outperform a larger, paler one.

Gemstone clarity grading chart — Type I to Type III

Gemstone Clarity Grading

Almost every natural gemstone has inclusions — tiny internal characteristics formed as the stone grew underground over millions of years. For astrological purposes, you don't need a flawless stone — you need good transparency, no visible cracks, and no heavy dark inclusions that block light from passing through. That's the balance our gem experts help you find within your budget.

Before You Buy
Points to Consider Before Buying
100% Natural
Never synthetic, lab-grown, or imitation. Unethical sellers routinely pass these off as natural — a stone that's engineered in a lab doesn't carry the same properties, however convincing it looks.
Unheated & Untreated
Heating, dyeing, diffusion and glass-filling are common ways to enhance colour and clarity — legally, if disclosed. But treated stones, even disclosed ones, are not considered suitable for astrological wear.
Never Pre-Used
Buy-back schemes mean many "new" stones have already been worn by someone else. For astrological purposes, your gemstone should be fresh from the mine — never previously owned.
Origin
Where a stone comes from shapes both its value and its astrological standing — Ceylon sapphires, Burmese rubies and Zambian emeralds are prized for good reason. Always ask for documented origin, not just the species of stone.
Ready to choose your gemstone? Choose your only natural gemstone from our certified collection.
INDEPENDENTLY VERIFIED
Backed by the World's Most Trusted Gem Labs
GIA and IGI certified gemstone reports
Everything covered so far — natural origin, no treatment, genuine weight, true colour and clarity — is a claim until it's verified. Certification is what turns it into proof. A certificate from a reputed lab independently confirms a gemstone is natural, discloses any treatment, and records its origin, so you're never relying on a seller's word alone. A certificate is your independent, legally backed proof of authenticity. Always read the comments section, not just the headline. Every gemstone we sell ships with its lab certificate — GIA, IGI, IIGJ or equivalent — so you can verify exactly what you're buying, independently of us. As part of the House of Shubh Gems, we're proud members of the Gems & Jewellery Export Promotion Council (GJEPC) — India's apex body for the gems and jewellery trade, recognised by the Ministry of Commerce & Industry, Government of India.
Getting the Benefit
How to Wear Your Gemstone
Match Your Metal
Each gemstone answers to a ruling planet — wearing it in the right metal (Gold, Silver or Panchdhaatu) is part of what makes it work.
Open-Back Setting
The stone should touch your skin directly for astrological benefit — that's why open-back mounts are standard for astrological jewellery.
Energised Before Wear
A gemstone should be activated through Vedic ritual (Pran-Pratishtha) before you start wearing it, aligning it with your energy.
Ready to set your stone? See our Customised Jewellery page for metal options and the full process.
Common Questions
Buying Gemstones, Answered
How do I choose the right gemstone for myself?

It depends on your purpose — astrology, healing, or jewellery. For astrological use, your kundli, planetary positions and current life goals all matter. If you're unsure, get a free recommendation from our Vedic experts based on your horoscope.

What determines a gemstone's quality?

Five factors: colour, clarity, cut, carat weight, and origin. A balance of these — not any single one — determines the best gemstone for your budget.

What's the ideal carat or ratti weight for me?

It depends on your body weight, the strength of the relevant planet in your chart, and your purpose for wearing it. General formulas exist, but an expert recommendation is more reliable.

Does the shape of the gemstone matter?

Not significantly for astrological benefit. Oval and cushion cuts are the most popular, but choose whatever balances appearance and comfort in the setting.

Why do natural gemstones have inclusions?

Inclusions are natural internal characteristics formed over time — completely flawless stones are rare and expensive. For astrological use, good transparency with minor, non-visible inclusions is ideal.

Are flawless gemstones always the better choice?

Not necessarily. Flawless stones are rare and costly; for astrological purposes, natural origin, good colour and clarity, and overall suitability matter more than perfection.

What does "unheated and untreated" actually mean?

It means the gemstone hasn't been enhanced through heating, dyeing, glass-filling or similar processes. Even disclosed treatments make a stone less suitable for astrological wear.

Why does certification matter so much?

A certificate from a reputed lab (GIA, IGI, IIGJ or similar) confirms authenticity, natural origin, and discloses any treatment. Always check the comments section for full transparency.

Why do gemstone prices vary so much?

Price depends on quality (colour, clarity, cut), origin, rarity and carat weight. Two stones of the same type can differ hugely in price purely on quality grounds.

Should I avoid heavily included or cracked stones?

Yes — visible cracks, dark inclusions, or low transparency make a stone unsuitable for astrological purposes, even at a lower price.

Why should I avoid pre-used gemstones?

A pre-used stone is thought to carry its previous wearer's energy, which isn't considered ideal in astrology. A fresh stone, sourced directly from the mine, is recommended.

Can I get a good gemstone within a modest budget?

Yes — the key is balancing quality, weight and price rather than maximising any one of them. Our experts help you find the best option within your specific budget.

Where should I purchase from?

Always buy from a source that sources direct from mines, certifies every stone independently, and never resells previously worn gemstones. At Only Natural Gemstones, every stone is 100% natural, unheated and untreated, certified by GIA, IGI, IIGJ or equivalent, and backed by a lifetime guarantee — with in-house Vedic experts to guide your choice and karigars to set it correctly. You're not just buying a stone; you're buying the assurance behind it.

Auspicious · Authentic · Astrological
Find Your Gemstone with Expert Guidance
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