Diana Castillo

Chicago,IL

Summary

Luxury Jewelry & Diamond Consultant recognized for exceeding sales targets and building an independent brand from the ground up. Secured a significant international partnership, facilitating global sourcing and custom design while enhancing operational efficiency. Expertly navigates client relationships and transforms abstract ideas into exquisite, personalized jewelry.

Overview

years of professional experience

Work History

Gemology Apprentice / Intern

Casa Mina Jewelry

Chicago, IL

01.2025 - 04.2026

Immersed in advanced diamond analysis under the mentorship of founder Jonathan Wolf, mastering technical specifications for elite loose diamonds, engagement rings, and wedding bands.
Managed and finalized multiple high-ticket bridal projects, ensuring alignment with production guidelines and client expectations.
Cultivated a proactive network of independent industry experts, bench jewelers, and consultants across Jewelers Row to enhance project outcomes.

Fine Jewelry & Watch Consultant

Dream Jewelers Inc.

Chicago, IL

01.2025 - 03.2026

Guided clients on luxury watch and jewelry assets, effectively matching showroom inventory with walk-in and private clients.
Recognized as the #1 Sales Representative within the first month, single-handedly closing over 7 custom fabrication projects.
Streamlined custom sales pipeline by managing complex client build portfolios and realizing high-profile creative visions.
Transitioned projects in excellent standing while fostering strong professional relationships with Dagoberto Anaya (Beto) and production staff.

Founder & Creative Director

Gems & Co.

01.2022 - Current

Built an independent jewelry and gemstone brand from inception, driving continuous growth through online engagement, local pop-ups, and curated jewelry parties.
Negotiated and secured an exclusive 4-year international partnership with a primary vendor in South Korea following self-funded global sourcing trips.
Direct all operational facets, including client life-cycle marketing, digital inventory management, premium parcel sourcing, and custom piece curation.
Enhanced brand visibility through strategic online promotions and engaging pop-up sales.

Skills

Gemstone analysis
Diamond grading
Custom fabrication
Jewelry design

Inventory management
Customer relationship management
Social media marketing
Bilingual communication

CORE COMPETENCIES

Custom Design & Fabrications: CAD conceptualization assistance, estate & vintage translation, timeline/milestone project tracking.
Diamond & Bridal Expertise: Engagement ring & wedding band consulting, loose diamond selection, precious metals knowledge.
Luxury Sales & Clienteling: High-Profile & HNWI account management, rapid lead conversion, word-of-mouth growth strategies.
Global Supply Chain: Vendor negotiations, crystal and gemstone sourcing, international trade relations.

EDUCATION & INDUSTRY RECOGNITION

Hands-on Industry Internships: Gemology & Fine Bridal (Casa Mina), Master-level Production/Sales Crash Course (Dream Jewelers).
Professional Benchmarks: Recipient of competitive recruitment offers from premier luxury institutions including James & Sons Fine Jewelers (declined due to commute/geography constraints).

Timeline