Education
Colored Bands in CVD-Grown Diamond
Srushti Tanti and Raju Jain


Figure 1. A growth remnant appeared as a color band (arrow) in a 3.14 ct CVD-grown diamond. Photomicrograph by Raju Jain; field of view ~11.75 mm.

Figure 2. A: Hazy parallel lines (indicated by arrows) resembling whitish internal graining. Photomicrograph by Raju Jain; field of view ~6.31 mm. DiamondView imaging of the pavilion facets showed blue growth layers in green fluorescence (B), as well as strong green phosphorescence (C). Images by Suraj Maurya.
The Surat laboratory recently examined a 3.14 ct F-color oval brilliant diamond grown by chemical vapor deposition (CVD). The diamond featured a single dark brown band measuring ~2.2 mm in length that resembled graining in natural diamond (figure 1). The band was visible under the microscope as well as with a 10× loupe. The clarity grade was VVS2 based on this colored band, which was visible through multiple bezels and affected the transparency at that location. Through the pavilion, parallel whitish bands were also observed (figure 2A).

Figure 3. False-color PL map of the SiV– defect at 736.6/736.9 nm using 633 nm laser excitation, normalized to the diamond Raman area on the pavilion. The dashed line indicates the approximate outline of the diamond.
The subtle banding seen in this diamond differed from a cloud of graphite inclusions at a growth interface previously reported in a CVD-grown diamond (Summer 2023 Lab Notes, pp. 213–214). The fluorescence image collected by the DiamondView revealed a layered growth structure that did not coincide with the color banding, indicating a start-stop cycling growth process typical of CVD synthesis (figure 2B). Deep UV fluorescence with green and blue coloration as well as strong green phosphorescence seen in the DiamondView image (figure 2C) indicated high-pressure, high-temperature treatment. The SiV– defect at 736.6 and 736.9 nm, a common feature of CVD laboratory-grown diamond and only rarely seen in natural diamond, was observed in photoluminescence (PL) spectra using 457, 514, and 633 nm laser excitation. PL mapping (figure 3) revealed that the concentration of SiV– was higher near the culet of the pavilion and dramatically lower near the table.
GIA has documented growth remnants in thousands of CVD-grown diamonds. But with a multitude of manufacturers, recipes, and treatments, a wide variety of clarity characteristics are encountered, including the unusual color band observed here.
Authors: Srushti Tanti is an analytics technician, and Raju Jain is a training specialist, at GIA in Surat, India.
This article was contributed by GIA® (Gemological Institute of America®)
GIA.edu | GIAindia.in

Education
Indian jewellery trade and industry expectations & trends
Market Sentiment: Cautiously optimistic despite price pressures

JewelBuzz has its finger firmly on the pulse of India’s glittering jewellery trade. From Ahmedabad to Agartala and Jammu to Kochi, we caught up with retailers, trade body reps, and key stakeholders to decode consumer moods, market trends, and the sparkle this festive season promises to bring.
From retail powerhouses like Kalyan Jewellers, Malabar, PNG Jewellers, Senco, and Joy Alukkas to the industry big leagues — GJEPC, GJC, and IBJA — and even the regional gems like Bhima Jewellers, Bidhan Jewellery Works, and Radha Gobindo Roy Grandson Jewellers, we tapped into the pulse of India’s jewellery scene.From metros to mandis, the buzz is real — we caught the moods, moves, and market vibes straight from every corner of the country.

The Indian jewellery industry is approaching the 2025 festive season with measured optimism, balancing record-high gold prices against resilient consumer demand driven by tradition, emotion, and investment psychology.

Key sentiment drivers
- Strong festival and wedding season alignment creating natural purchase momentum
- Gold viewed as both cultural necessity and safe-haven investment during uncertain times
- Consumer confidence improving post-GST reforms and easing inflation
- Panic buying emerging as consumers anticipate further price escalation
- Robust pre-bookings and footfall reported across major retailers
The Gold Price Factor: Challenge Turned Opportunity

Impact of elevated gold prices
- Creating volume pressure while maintaining value sales
- Triggering shift toward lightweight and lower-carat options (18K, 14K)
- Driving 50-55% of sales through old gold exchange programs
- Paradoxically strengthening investment demand for coins and bars
- Encouraging premiumization in platinum segment (up 57% YTD, still more affordable than gold)

Retailer response
- Expanding product range across price points (Rs. 25,000 to Rs. 20 lakh+)
- Increased advertising spend to capture demand
- Launch of new showrooms by major chains before Diwali
- Focus on innovative collections balancing tradition with contemporary appeal
Emerging Consumer Preferences: The New Jewellery Buyer

Demographic shifts
- Millennials and Gen Z: Gravitating toward studded, gemstone, and fusion designs
- Young professionals: Preferring lightweight, everyday wear pieces
- Traditional buyers in Tier 2/3 cities: Beginning to explore diamond jewellery
- Affluent segments: Maintaining purchase levels despite price increases

Product category trends
- Lightweight jewellery: Strong bookings across all demographics
- Daily wear pieces: Growing preference over purely occasional jewellery
- Handcrafted and bespoke: Premium segment seeking artisanal value
- Fusion temple jewellery: Blending traditional motifs with modern aesthetics
- Bridal collections: Sustained demand with weddings driving 60%+ of market
The Alternative Metals Revolution

Silver’s moment
- Significant spike in demand as affordable gold alternative
- Corporate gifting orders increasing substantially
- Investment demand for coins and bars showing healthy uptake
- Contemporary designs attracting younger consumers

Platinum’s premium positioning
- 57% price appreciation YTD creating value perception vs. gold
- 95% purity and rarity appealing to aspirational buyers
- Natural whiteness enhancing diamond brilliance
- Positioned as “modern heirloom” for younger audiences
Natural vs. Lab-Grown Diamonds: Parallel Growth Stories

Natural diamonds
- Projected 18-20% growth in top cities
- Sub-Rs.2 lakh category emerging as sweet spot for gifting and everyday wear
- Traditional gold buyers in smaller cities beginning exploration
- Positioned as “everyday expressions of love” beyond pure luxury

Lab-grown diamonds (LGD)
- Exceptional traction among conscious luxury seekers
- Appeal based on authenticity, innovation, and responsible sourcing
- Strong performance in lightweight, versatile designs and solitaires
- One retailer reporting expected 40% festive uplift
- Attracting self-purchase and individual expression segments

Strategic Industry Responses
Inventory and infrastructure
- Scaled-up inventory levels anticipating surge demand
- Expanded retail touchpoints and new showroom launches
- Fresh collections timed for festive season
- Enhanced omnichannel presence

Marketing intensification
- Campaigns across digital screens, hoardings, and in-store events
- Increased advertising visibility to capture consideration
- Specialized collections (Elements of Nature, Aham for men, Infinity Diamond™)
- Focus on storytelling around craftsmanship and meaning

Price point diversification
- Entry-level: Rs.25,000-Rs.50,000 for young buyers
- Mid-range: Rs.50,000-Rs.5 lakh for festive/occasion wear
- Premium: Rs.5 lakh-Rs.20 lakh+ for weddings
- Flexible options through lower karatage (18K, 14K, 9K)

Regional Insights
Pan-India patterns
- Central India: Strong response to purity, design, and trust messaging
- Eastern markets (Cuttack, Kolkata): Robust bridal and daily wear demand
- Tier 1 cities: Double-digit growth projections
- Tier 2/3 cities: Traditional buyers expanding into new categories

The Emotion-Investment Duality
A defining characteristic of this festive season is the dual motivation driving purchases
A)Emotional drivers:
- Diwali’s cultural and religious significance
- Family celebration and togetherness
- Gifting as relationship expression
- Personal milestones and self-expression
- Jewellery as storytelling and identity
B)Practical considerations:
- Gold as secure asset and wealth preservation
- Price appreciation creating urgency
- Tradition meeting financial wisdom
- Value consciousness alongside aspiration
- Investment mindset coexisting with aesthetic appeal

Forward Outlook: Balanced Growth Expected
Industry projections
- Healthy season anticipated despite volume pressures
- Strong broad-based growth across all categories
- Momentum expected to continue through wedding season
- Retailers expressing confidence in sustained demand
Risk factors being managed
- Price volatility requiring nimble strategy
- Consumer purchasing power constraints
- Competition from alternative investment instruments
- Balancing tradition with evolving preferences
Opportunities identified
- Growing everyday wear and self-purchase segments
- Expanding market for alternative metals
- Younger demographics entering premium categories
- Conscious luxury and sustainability narratives gaining traction
The 2025 festive season reflects an Indian jewellery industry in evolution rather than disruption. While gold price levels present genuine challenges, they’re being offset by diversification strategies, consumer adaptability, and the enduring emotional significance of jewellery in Indian culture.
The industry’s resilience lies in its ability to honor tradition while embracing contemporary preferences—offering lightweight designs alongside bridal sets, lab-grown options beside natural diamonds, and silver alongside gold and platinum. With strong pre-season indicators and multi-category growth, retailers are positioned for a season that validates both the timelessness of jewellery in Indian celebrations and the industry’s capacity for thoughtful innovation.
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