Natural Tanzanite Diamond Halo Pendant

An Exceptional Collector's Jewel

Few gemstones have captured the imagination of collectors and jewelry connoisseurs quite like Tanzanite. Found exclusively in the foothills of Mount Kilimanjaro, Tanzania, this remarkable gemstone is celebrated for its extraordinary blue-violet color, exceptional rarity, and limited geographic origin. With only a single known commercial source in the world, Tanzanite has become one of the most coveted colored gemstones of the modern era.

This magnificent pendant showcases an impressive 19.86-carat Natural Tanzanite, displaying the highly desirable AAA Royal Blue "D-Block" color sought after by collectors. Its rich bluish-violet body color is complemented by remarkable flashes of electric blue and violet as the gemstone moves in the light, creating a brilliance and depth that few gemstones can rival.

Expertly fashioned into a classic cushion cut and surrounded by a halo of brilliant natural diamonds, this exceptional gemstone is beautifully presented in an elegant 18K white gold pendant. The diamond halo enhances the vivid color of the Tanzanite while adding brilliance and sophistication to an already extraordinary piece.

Acquired during the late 1990s from renowned gemstone dealer Frank M. Circelli, this pendant represents an exceptional example of premium Tanzanite from an era when some of the finest material ever recovered from the Merelani Hills entered the marketplace. Large Tanzanites approaching twenty carats with this level of color, clarity, and craftsmanship are increasingly difficult to obtain, making this pendant both a remarkable work of jewelry and an exceptional collector's acquisition.

Whether worn as an elegant statement piece or preserved as part of a distinguished gemstone collection, this extraordinary Tanzanite pendant embodies rarity, timeless beauty, and enduring value.

Pendant Details

Jewelry: 18K Gold Diamond Halo Pendant

Center Gemstone: Natural Tanzanite (Zoisite)

Weight: 19.86 Carats

Shape: Cushion Cut

Measurements: 14.83 × 13.72 × 8.89 mm

Origin: Tanzania

Color Grade: AAA Royal Blue / "D-Block"

Body Color: Rich Bluish Violet

Optical Characteristics: Exceptional Neon Blue-Violet Flash with Outstanding Pleochroism

Clarity: VVS – Exceptional

Certification: GIA Certified Natural Zoisite (Tanzanite)

Treatment: Standard Heat Treatment (Industry Accepted)

Setting: 18K White Gold Diamond Halo Pendant

Accent Stones: Approximately 20 Natural Round Brilliant Diamonds

Price

$49,500

(Serious Inquiries and Reasonable Offers Will Be Considered.)

At Castillo Gem Company, every gemstone is personally selected for exceptional beauty, rarity, and lasting value. We believe acquiring an important gemstone should be a personal experience built on trust, knowledge, and integrity.

If you would like additional information about this extraordinary Natural Tanzanite Diamond Halo Pendant, request additional photographs or videos, or discuss custom jewelry and collector opportunities, we invite you to contact Castillo Gem Company. It would be our privilege to assist you in acquiring this exceptional heirloom-quality piece.

Natural Paraíba Tourmaline

A Rare Treasure of Extraordinary Beauty

Few gemstones have captivated the world of fine jewelry quite like the Paraíba Tourmaline. Renowned for its vivid electric blue-green color created by traces of copper, genuine Paraíba tourmalines are among the rarest and most valuable colored gemstones in existence.

This exceptional 3.33-carat Natural Paraíba Tourmaline possesses the remarkable neon brilliance that has made these extraordinary gemstones legendary among collectors, designers, and gem connoisseurs. Its vibrant blue-green color radiates with an unmistakable glow, displaying exceptional brilliance under virtually every lighting condition.

Originally discovered in the Brazilian state of Paraíba during the late 1980s, copper-bearing tourmalines have since been found in only a handful of African deposits, including Nigeria. Fine-quality Nigerian Paraíba tourmalines exhibiting vivid color, outstanding clarity, and superior brilliance remain exceptionally scarce and continue to grow in demand among collectors worldwide.

Unlike many larger collector gemstones, this beautifully proportioned trillion-cut Paraíba is ideally suited for an exceptional custom jewelry creation. Whether showcased as the centerpiece of a custom ring, pendant, or heirloom-quality design, it offers a rare opportunity to own one of the world's most celebrated gemstones in a size perfectly suited for everyday enjoyment while maintaining outstanding investment appeal.

Stone Details

Gemstone: Natural Copper-Bearing Paraíba Tourmaline

Weight: 3.33 Carats

Shape: Trillion Cut

Origin: Nigeria

Color: Vivid Electric Blue-Green

Clarity: Excellent

Certification: GIA Certified

Price: $14,995
(Serious Inquiries and Reasonable Offers Will Be Considered.)

At Castillo Gem Company, every gemstone is personally selected for exceptional beauty, rarity, and lasting value. We believe acquiring an important gemstone should be a personal experience built on trust, expertise, and integrity.

Stone Details

Natural Australian White Opal

Weight: 4.42 Carats

Shape: Fancy Cut

Phenomenon: Exceptional Play-of-Color

Color Display: Brilliant flashes of blue, green, yellow, orange, and red

Clarity: Natural Opal with Outstanding Brightness and Color Play

Price: $5,900
(Serious Inquiries and Reasonable Offers Will Be Considered.)

Natural Australian White Opal

Nature's Living Masterpiece

Few gemstones possess the captivating beauty and individuality of a fine Australian White Opal. Revered for centuries as one of nature's most extraordinary creations, every natural opal is completely unique, displaying an ever-changing play of color unlike any other gemstone in the world.

This exceptional 4.42-carat Natural Australian White Opal exhibits a remarkable display of brilliant spectral colors, with vivid flashes of blue, green, yellow, orange, and red that dance across the surface as the gemstone moves in the light. The mesmerizing play-of-color creates a living work of art, ensuring that no two viewing angles are ever quite the same.

Australia has long been recognized as the world's premier source of the finest opals, producing the overwhelming majority of gem-quality material found today. Carefully selected for its outstanding brilliance, exceptional color play, and attractive fancy cut, this remarkable gemstone represents the timeless elegance and natural beauty that have made Australian opals treasured by collectors and jewelry enthusiasts throughout the world.

Whether destined to become the centerpiece of a custom-designed pendant or ring, or preserved as part of a distinguished gemstone collection, this extraordinary White Opal offers an opportunity to own one of nature's most fascinating and enchanting gemstones.

Price: $5,900
(Serious Inquiries and Reasonable Offers Will Be Considered.)

At Castillo Gem Company, every gemstone is personally selected for exceptional beauty, rarity, and lasting value. We believe acquiring an important gemstone should be a personal experience built on trust, expertise, and integrity.