About VIBHINI

Laboratory-Grown Diamond Jewellery, Made in Surat

VIBHINI is a family jewellery house in Surat, founded by brothers Nikunj and Vishrut Koshiya on three generations of diamond manufacturing. Every piece is made to order, in the metal and stone you choose.

Last updated 1 October 2026

Where your piece is made

Surat is where most of India’s laboratory-grown diamonds are cut and polished, and it is where VIBHINI works. We are the workshop, not a shop that buys in: the stone is graded here, the design is drawn here, the metal is cast here and the stone is set here. Every piece is checked at setting, at finishing and again before it is packed.

The business was founded on 14 November 2025 by Nikunj and Vishrut Koshiya, brothers, in a family that has made diamonds in Surat for three generations. Your piece is made after you order it, and nothing is made before you choose it.

What we set

You choose between a laboratory-grown diamond and moissanite on every design. A laboratory-grown diamond is grown in a laboratory rather than mined, with the same crystal structure as a mined diamond. Moissanite is a different stone, and we never call it a diamond.

Every laboratory-grown diamond we set is E to F colour and VVS to VS clarity, from the centre stone to the smallest stone in a pavé. A laboratory-grown main stone above 1 carat comes with an IGI report, in the box with your piece.

The metals

Silver, rhodium-plated or gold-plated, and 9K, 10K, 14K or 18K gold in yellow, white or rose. The colour never changes the price. Our 9K, 14K and 18K gold jewellery is BIS hallmarked.

How a price is worked out

The price you see is the metal your design needs at the day's gold rate, plus its stones, the making, and our margin. Change the metal or the stone and the price changes with it. When the gold rate moves, so does the price.

Made to order

Making takes about 15 days. Prices are for a US 6.5 ring, a 6.5-inch bracelet and a 16-inch necklace; other sizes are made on request and quoted separately. Delivery is free across India, every parcel is insured and needs a signature, and we ship worldwide except Pakistan. The details are in Shipping & Returns.

After it arrives

Six months of warranty against manufacturing defects, with us paying the shipping both ways. Beyond that, polishing is free for as long as you own the piece, and a ring is resized free within one size where the design allows — you pay the postage. Re-plating is free on gold and charged at cost on silver. These are for the original owner. See Resizing & Care.

Who you're talking to

Nikunj Koshiya looks after sales and customer care. Vishrut Koshiya looks after production. You deal with them directly.

We meet clients by appointment, at our office in Katargam, Surat, or by video call. Full details are on the Contact page.

We also make jewellery for brands, retailers, wholesalers and designers: that side of the business is on the trade page.