Authentic diamond stud earrings in solid gold — 0.9ct Round Brilliant cut diamonds set in a butterfly or push-back post fitting, delivering the clean, precise look of a well-cut stone against the earlobe. This Qutahia Jewellery design features a 0.9ct Round Brilliant diamond per earring in solid gold, available in 14ct or 18ct yellow, white, or rose gold with natural or lab-grown stone options.

• Brand: Qutahia Jewellery
• Metal: 14ct or 18ct gold — yellow, white or rose
• Diamond: Round Brilliant cut, butterfly post setting
• Total carat weight: 0.9ct (pair)
• Diamond option: Natural or lab-grown
• Handmade: Crafted by skilled artisans
• Collection: Solitaire

Why 0.9ct Round Brilliant stud earrings are a benchmark piece

Diamond stud earrings at 0.9ct total (0.45ct per earring) deliver a visually substantial stone on the lobe — large enough to read clearly from a normal social distance, small enough to be appropriate across a full range of occasions. The Round Brilliant cut is the benchmark diamond cut: 58 facets arranged to maximise light return, producing the white flash and coloured fire that defines the standard for diamond brilliance. Browse the full Solitaire collection at qutahia.co.uk.

The Problem

Finding diamond stud earrings at 0.9ct that are actually in solid gold (not gold-filled or gold-plated) and feature a properly cut stone is harder than it should be. At this carat weight, cut quality matters more than at smaller sizes — a poorly cut 0.9ct stone looks duller than a well-cut 0.5ct stone. The butterfly fitting must hold the earring flat against the lobe; a loose fitting lets the earring tip forward so the stone faces down instead of out.

Round Brilliant at 0.9ct

The Round Brilliant cut has 58 facets arranged in a precise geometric pattern — table, crown, girdle, pavilion, culet — each angled to redirect incoming light back toward the viewer. At 0.9ct, the stone is large enough that the facet pattern is clearly visible in normal light: the characteristic arrows-and-hearts pattern when viewed from above, the bright centre with patterned dark areas when viewed through the table. This is the visual language of the Round Brilliant, and at 0.9ct it reads with real presence. The butterfly (or push-back) fitting holds the earring securely while keeping the profile low behind the lobe.

Picture This

Put them on before you leave the house. Not every day requires a diamond earring, but there are enough days that do — and at 0.9ct Round Brilliant in solid gold, this is the earring for those days. Under artificial light at dinner. Under natural light in a meeting. In photographs. The Round Brilliant is engineered to perform in every light condition, and at 0.9ct the performance is clearly visible from across a table. Solid gold means the setting holds over time: the prongs do not soften, the finish does not change, the butterfly fitting continues to hold.

Frequently Asked Questions

What are diamond stud earrings?

Diamond stud earrings are a single diamond (or cluster) set on a post that passes through the ear piercing, with a butterfly or push-back fitting on the reverse to hold the earring in place. They sit flat against the lobe, showing only the stone and minimal setting from the front. They are the simplest and most versatile diamond earring style.

What is a butterfly fitting on earrings?

A butterfly fitting (also called a push-back or friction back) is a small clip with two wings that grips the post behind the ear. The wings can be squeezed to release the earring, and the clip grips the post when released. It is the most common earring back for stud earrings and provides a secure, low-profile hold. High-quality butterfly fittings are made in the same metal as the earring post.

How do I choose between 14ct and 18ct gold for stud earrings?

14ct gold contains 58.3% pure gold and is harder and more scratch-resistant than 18ct. 18ct gold contains 75% pure gold and has a richer, deeper colour — particularly noticeable in yellow and rose gold. For earrings that are worn daily and handled frequently (putting on, taking off), 14ct is a practical choice. For a richer colour or for occasional wear, 18ct is preferable. Both are solid gold throughout.

What carat weight is considered large for stud earrings?

For stud earrings, visual perception of size depends on the diameter of the stone. A 0.45ct Round Brilliant has a diameter of approximately 4.8mm — clearly visible and reads as a proper diamond earring at social distances. 0.9ct total (0.45ct per earring) is considered a substantial pair of stud earrings. Above 0.5ct per earring (1ct total) the stones are considered large and formal. Below 0.25ct per earring the stones are considered modest and everyday.

Are lab-grown diamonds real diamonds?

Yes. Lab-grown diamonds are chemically, physically, and optically identical to mined diamonds — the same carbon crystal structure, the same hardness (10 on the Mohs scale), the same optical properties. They are graded by the same laboratories using the same 4C criteria. The only difference is origin: one formed underground over billions of years, the other formed in a controlled environment over weeks. Lab-grown diamonds are a real and appropriate choice for any diamond jewellery application.