At SaCobra Gems, you’re not buying jewellery — you’re commissioning a piece of art. Every design is crafted through our private Hatton Garden network, using certified stones and meticulous hand‑finishing to ensure exceptional quality without the traditional retail markup. We offer a discreet, one‑to‑one service from concept to creation, complete with transparent pricing, CAD previews, and a craftsmanship guarantee. It’s bespoke jewellery, made personal, with the precision and integrity your story deserves.

We don’t mass‑produce. We don’t follow trends. We create intentional, sculptural jewellery through our Hatton Garden network — pieces with weight, presence, and story.

Our approach is simple: precision, transparency, and personal service at every stage. We take the time to understand your vision, translate it into detailed CAD designs, and craft each piece through our trusted Hatton Garden network using certified stones and meticulous hand‑finishing. You’re involved in every step — no guesswork, no hidden costs, just a calm, private, one‑to‑one experience that delivers exceptional jewellery made exclusively for you.

• Hatton Garden partners

• GIA/IGI/HRD certified stones

• Transparent pricing

• Private 1:1 concierge service

The 4 C’s of Diamonds (Cut • Colour • Clarity • Carat)

1. Cut — The Sparkle Factor

The most important C. Cut determines how well a diamond handles light — its fire, brilliance, and scintillation. A perfectly cut diamond looks alive; a poorly cut one looks dull even if it’s high colour and clarity.

Grades: Excellent, Very Good, Good, Fair, Poor.

2. Colour — How White the Diamond Appears

Colour measures the presence of yellow or brown tint. The less colour, the more valuable.

Scale: D (colourless) → Z (light yellow). Luxury stones typically sit between D–F (colourless) or G–H (near colourless).

3. Clarity — Internal & External Purity

Clarity assesses inclusions (internal marks) and blemishes (surface marks). Fewer inclusions = rarer and more valuable.

Scale:

• FL – Flawless

• IF – Internally Flawless

• VVS1 / VVS2 – Very, Very Slightly Included

• VS1 / VS2 – Very Slightly Included

• SI1 / SI2 – Slightly Included

• I1 / I2 / I3 – Included

For jewellery photography and wow‑factor pieces, VS2 or better is ideal.

4. Carat — Weight, Not Size

Carat measures weight, not visual size. Two diamonds of the same carat can look different depending on cut proportions.

1.00ct = 0.2 grams Well‑cut stones look larger and brighter than deep or shallow cuts.

The 7C’s of Coloured Gemstones

1. Colour — The Soul of the Gem

The most important factor for coloured stones. Evaluates hue, tone, and saturation — the richness, depth, and vibrancy of the colour. Exceptional gems show pure, vivid, evenly distributed colour without zoning.

2. Clarity — Natural Fingerprint of the Stone

Assesses the presence of inclusions and surface features. Unlike diamonds, inclusions in coloured gems are often expected and can even enhance character (e.g., silk in sapphires). The key is transparency and whether inclusions affect beauty or durability.

3. Cut — How the Gem Comes Alive

Cut determines how the gem handles light, brilliance, and face‑up colour. A well‑executed cut maximises colour, hides inclusions, and gives the stone its personality. Shapes vary by gem type due to crystal structure.

4. Carat — Weight and Presence

Carat measures weight, but in coloured gemstones, face‑up size and colour intensity matter more than weight alone. Some gems (e.g., rubies, emeralds) become exponentially rarer as size increases.

5. Certified Report — Independent Verification

A gemmological certificate from a respected lab (GIA, AGL, GRS, SSEF, Gübelin) confirms:

• identity

• natural vs lab‑grown

• treatments (heat, oil, diffusion, etc.)

• origin (when determinable)

This protects both buyer and seller.

6. Confidence — Trust in the Seller

Represents the credibility, transparency, and ethics of the jeweller. Clients should feel assured about:

• authenticity

• treatment disclosure

• fair pricing

• return policies

• aftercare

Confidence is a core pillar of luxury gemstone buying.

7. Character — The Gem’s Unique Personality

The intangible quality that makes a gemstone unforgettable. Character includes:

• how the stone “speaks” through its colour

• its inclusions as natural artistry

• its cut style

• its overall presence and emotional impact

Character is what transforms a gemstone from a commodity into a treasure