A buyer in Calgary asked us to build a mother's ring with three birthstones and a 6.5 mm moissanite center. The brief listed an April (diamond-white), a May (emerald-green) and an August (peridot-green) child. The first thing we flagged was that two of those stones, emerald and peridot, sit well below moissanite on the Mohs scale and would not survive next to a center stone that clients wear daily. That conversation is the basis for the birthstone-and-moissanite spec we now quote to every wholesale buyer who asks for a family piece.
The 12 birthstones and their hardness
Moissanite measures about 9.25 on Mohs. Most birthstones are softer, and a few are dramatically softer. The numbers below are the production hardnesses we plan around:
- Hard enough to sit beside moissanite (7.5+): January garnet (7.0 to 7.5), April diamond or white sapphire (10 / 9), July ruby (9), November topaz or citrine (8), December blue zircon or turquoise substitute (7 to 7.5).
- Wearable but needs a bezel (6.5 to 7.5): February amethyst (7), March aquamarine (7.5), May emerald (7.5 to 8 but brittle), September sapphire (9), October opal or tourmaline (5.5 to 7.5).
- Soft - use as pendant or occasional-wear piece (5 to 6): June pearl or alexandrite substitute (2.5 to 8 depending on pick), August peridot (6.5 to 7), October opal (5.5 to 6.5).
For the moissanite side, Wikipedia's moissanite entry gives the Mohs and thermal numbers we reference in quotes. Soft stones in a daily-wear ring go into a bezel, not into prongs, and we tell the buyer up front that the piece is not for a construction-site hand.
Color pairing: which birthstones fight moissanite
Moissanite reads as colorless white with a cool, slightly green-yellow fire. Two color combinations clash visibly:
- Green birthstones next to moissanite (emerald, peridot, green tourmaline) - the moissanite's faint green fire blends into the green stone and the center loses contrast. We space them with a 14K metal bead or use a white-sapphire center instead.
- Bright red next to canary or pink (ruby plus pink tourmaline) - both read as warm and blur together; we widen the gap between them.
The cleanest combinations are white center with one deep saturated side stone (ruby, sapphire, amethyst) or a three-stone row where each birthstone sits in its own bezel with metal between. The moissanite shape guide covers how the center shape changes the layout around it.
Design layouts we ship
Three layouts cover roughly 90% of family-piece orders:
- Three-stone horizontal - center moissanite flanked by two birthstones, bezel-set, on a 4 mm band. Best for two-child families.
- Cluster / mother's ring - a center moissanite with 3 to 5 small birthstones around it on a halo. Best for 3- to 5-child families; stone size drops to 2.5 to 3 mm.
- Vertical bar pendant - birthstones stacked in a row on a 2.5 mm bar, moissanite above or below. We recommend this for soft birthstones because pendants take less impact than rings.
For a pendant version, the same chain-and-bail math applies; our necklace chain and bail guide covers the gauge.
Sourcing and batch consistency
Birthstones are natural color. When a buyer orders a 5-unit batch of the same design, we source all side stones from one parcel so the greens or reds match. For repeat orders six months later, color will vary; we photograph the new parcel before setting and send it for sign-off. Moissanite centers are lab-made and consistent by mm size, which is why we keep them as the anchor of the piece. Our bracelet style guide covers the same batch-consistency problem for station pieces.
Which birthstones are softest?
Opal (5.5 to 6.5), pearl (2.5 to 4.5) and peridot (6.5 to 7). We set these in bezels and recommend a pendant rather than a daily-wear ring.
Can you match birthstone color across batches?
Within one batch, yes - we source from a single parcel. Across batches separated by months, color varies; we send a photo of the new parcel for sign-off before setting.
What center size works best?
A 5 to 6.5 mm moissanite center with 2.5 to 4 mm birthstones around it. A larger center crowds the side stones.
Do customers prefer rings or pendants?
Rings for two-child families; pendants for three or more children and for soft birthstones. Our mix is roughly 60% ring, 40% pendant.
How long does a birthstone combo take?
25 to 30 working days, because side-stone sourcing and sign-off add 3 to 5 days beyond a standard solitaire. MOQ is 5 units per design.
Send us the birth-month list, the center-stone mm size and the layout you want. We will return a CAD render with the side-stone parcel photo and a firm quote within four working days. Order your custom family piece today.
Frequently Asked Questions
Is moissanite a good diamond alternative for retail buyers?
Yes for price-sensitive customers who want brilliance and hardness. Moissanite ranks 9.25 on the Mohs scale, holds up to daily wear and costs a fraction of a natural diamond of the same size, so it resells fast in bridal and fashion lines.
What is the minimum order for wholesale moissanite?
MOQ starts at 50 pieces per design for stock items. Custom cuts and private-label settings usually start at 100–300 pieces depending on the mold.
Do you provide certificates with moissanite stones?
Yes. Every parcel ships with GRA or IGI documentation listing carat weight, color grade and cut. We recommend passing the certificate to your end customer for trust.
How long does sample and bulk production take?
Samples ship in 3–5 days. Bulk runs take 15–20 days under 500 pieces, and 25–30 days for custom work.
