Diamond alternatives — moissanite, CZ, white sapphire compared

Alternatives are legitimate materials — the ethics live in DISCLOSURE.

• Moissanite — silicon carbide; hardness 9.25, sparkle even hotter than diamond (more fire), a fraction of the price. The strongest alternative for daily wear.
• Cubic zirconia — hardness 8-8.5, brilliance good, but scratches and clouds over years. The fashion-tier choice.
• White sapphire — real corundum, hardness 9, but reads flat next to diamond's refraction; loved for natural-gem preference.
• Lab-grown diamond — chemically diamond (not an alternative, an ORIGIN choice); graded on the same 4Cs.

Material	Hardness	Look	Price tier
Natural diamond	10	Benchmark	Highest
Lab diamond	10	Same	Mid-high
Moissanite	9.25	More fire	Mid
White sapphire	9	Subtler	Mid-low
CZ	8.5	Good, then clouds	Low

Buying rule: any honest seller names the material. Full gem fundamentals sit in the gemmology course.

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Go deeper — free

Watch the free replays at the gem webinar library — the gem e-book is the written companion. When curiosity becomes commitment, the gemmology foundation course is the ladder's first rung (online entry: GT100e); dates on the calendar. Play Name That Gem to train the eye between sessions.

What students say

“It is fun, interesting & educational!”

— Shahirah A. (Singapore) · published student feedback

“I will use the skills acquired to make pieces for family, friends and of course, myself! If I could get to a point of eventually selling pieces, even better!”

— Elena A. (Australia) · published student feedback

Free ways to explore

No sign-up, no payment — start with any of these.

WWatch a free gem webinarFREE
Full recorded sessions — the best free starting point.JJDMIS on YouTubeFREE
Course previews, blended-learning explainers and school life.FFree jewellery webinar replaysFREE
Recorded sessions on design and the jewellery industry.DDownload the gem e-bookFREE
The school's free guide to gems — pairs with the replays.

Keep exploring

Opal — play of colour, care and buyingOpal explained — precious opal's play of colour, body tones, stability and the care rules Jewellery video library — webinars, replays and free learning resourcesFree jewellery video learning — the gem, jewellery and pearl webinar replay libraries fromBlended learning explained — where video helps jewellery students mostHow blended learning works for jewellery education — video before class, in-studio practicAquamarine — the sea-blue berylAquamarine explained — the durable blue beryl, how colour saturation drives price, emerald

See the online and blended options

Gemmology can be started fully online, and every classroom course at JDMIS has a video-supported path.

Visit jdmis.edu.sg