Rock gem

Dig for semi-precious gemstones and minerals. For ages 8 - 11. CAUTION: GOGGLES ARE A TOY. DO NOT PROVIDE PROTECTION.

    SPECTACULAR 5.44 CARAT VVS TOP FIRE RARE  ‘PEACH’ NATURAL RATANAKIRI CAMBODIAN ZIRCON. GEM TYPE: NATURAL ZIRCON CARAT WEIGHT: 5.44 CARATS DIMENSIONS: 9.80 x 8.20 x 6.30mm CLARITY: VVS  CUT: OVAL ORIGIN: BOR KEO, RATANAKIRI, CAMBODIA TREATMENTS: NONE Zircon is actually the oldest known mineral on Earth - the oldest samples are even older than the Moon, which formed about 4 billion years ago. Zircon was the first crystal to form in molten granite as it cooled to form rock. It formed as the result of a process associated with the presence of Uranium and Thorium. The natural radioactivity disrupts the crystal structure and produces the changes in color and density through a process known as metamictization.   Cambodia's north easternmost province is named after two of its distinctive features: Ratanakiri, a combination of the Khmer words for ‘gem’ (Ratana) and ‘mountain’ (Kiri).   Ratanakiri is one of the wildest and least visited regions in Cambodia. It is located in the north-east side of the country, bordering Laos and Vietnam. There one can find steaming jungles,  breathtaking waterfalls, amazing wildlife, and of course, the mines of the majestic Zircon.   The District of Bor Keo (Borkeo) where this specimen was mined is located about thirty kilometres from the regional capital Banlung. When people are asked about Cambodia, two things come to mind: Angkor Wat and the Khmer Rouge. With awareness and careful management of its resources, hopefully we can add Cambodia’s natural beauty to that list. The fire in Zircon, called dispersion, is caused by light entering the gemstone and separating into a prism of rainbow colors. Possessing dispersion approaching that of Diamond, the brilliance of Zircon is second to none. The Zircon Cut, a variation of the Brilliant Cut that adds eight extra facets to the pavilion, was designed to take advantage of these properties. A very unique characteristic of Zircon is birefringence (doubly refractive), meaning that light splits into two rays as it passes through the gem. As a result, the back facets appear as double images.

    STRIKING 3.65 CARAT VS TOP FIRE RARE  ‘GOLD WITH BRONZE OVERTONES’ NATURAL RATANAKIRI CAMBODIAN ZIRCON. GEM TYPE: NATURAL ZIRCON CARAT WEIGHT: 3.65 CARATS DIMENSIONS: 8.45 x 7.30 x 4.75mm CLARITY: VS CUT: CUSHION ORIGIN: BOR KEO, RATANAKIRI, CAMBODIA TREATMENTS: NONE Zircon is actually the oldest known mineral on Earth - the oldest samples are even older than the Moon, which formed about 4 billion years ago. Zircon was the first crystal to form in molten granite as it cooled to form rock. It formed as the result of a process associated with the presence of Uranium and Thorium. The natural radioactivity disrupts the crystal structure and produces the changes in color and density through a process known as metamictization.   Cambodia's north easternmost province is named after two of its distinctive features: Ratanakiri, a combination of the Khmer words for ‘gem’ (Ratana) and ‘mountain’ (Kiri).   Ratanakiri is one of the wildest and least visited regions in Cambodia. It is located in the north-east side of the country, bordering Laos and Vietnam. There one can find steaming jungles,  breathtaking waterfalls, amazing wildlife, and of course, the mines of the majestic Zircon.   The District of Bor Keo (Borkeo) where this specimen was mined is located about thirty kilometres from the regional capital Banlung. When people are asked about Cambodia, two things come to mind: Angkor Wat and the Khmer Rouge. With awareness and careful management of its resources, hopefully we can add Cambodia’s natural beauty to that list. The fire in Zircon, called dispersion, is caused by light entering the gemstone and separating into a prism of rainbow colors. Possessing dispersion approaching that of Diamond, the brilliance of Zircon is second to none. The Zircon Cut, a variation of the Brilliant Cut that adds eight extra facets to the pavilion, was designed to take advantage of these properties. A very unique characteristic of Zircon is birefringence (doubly refractive), meaning that light splits into two rays as it passes through the gem. As a result, the back facets appear as double images.

What is Moissanite? Moissanite is truly a unique stone and so is the story of Henri Moissan who discovered the crystal in 1893 while examining rock samples from a meteor crater in Canyon Diablo,Arizona. He initially mistaken the crystal as a diamond, he later identified the crystals as silicon carbide, the mineral form of silicon carbide was named moissanite in honour of Moissan later in his life.Moissanite as we know it today is laboratory-created as moissanite in its natural form, is extremely rare. Ralph Jacobs successfully synthesized their own collection of Moissanite that mimics the characteristics of a Natural Moissanite, known as Evermore Radiant, Evermore Brilliance and Evermore Classic. Evermore Radiant which is the highest quality of moissanite (E-F colour) can be compared to a E colour GIA-certified diamond.While diamonds are graded on the 4 C's scale (Cut, Clarity, Color, Carat), moissanites are graded solely on color. The cut and clarity is similar across different qualities of moissanites. Why choose the Ralph Jacobs created Moissanite? Quality Ralph Jacobs created Moissanite is The Brightest Alternative to a Diamond, On the Mohs Scale (Hardness) moissanite is 9.25 compared to a diamond which is 10. The difference of only.75 is not enough to discount the high durability of the moissanite. However, Moissanite Refraction Index (RI) and Fire Dispersion out ways that of a diamond, making the moissanite more brilliant (shine) compared to a diamond. Diamond vs Moissanite Diamond Moissanite Refractive Index (RI) 2.42 2.26-2.69 Fire Dispersion 0.04 0.10 Hardness Mohs Scale 10 9.25 Toughness Excellent* Excellent Price $$$ $$ Cost Natural diamonds prices vary based on shape, carat, cut, color, and clarity. Moissanite gems vary in price only based on size and colour.Moissanite is are more affordable than natural diamonds.Ralph Jacobs offer 3 colours namely Evermore Radiant (E-F colour), Evermore Brilliance (G-H colour) and Evermore Classic (I-J colour). Evermore Radiant being the supreme colour and most expensive in the range. For a 1ct Evermore Radiant Round Moissante. The Ralph Jacobs created Moissanite Lifetime Warranty Ralph Jacobs provides a Lifetime Warranty that applies to your purchase of authentic RALPH JACOBS CREATED MOISSANITE gem(s) that are 4mm in size or larger.The terms of the Lifetime Warranty include a warranty against defects in material and workmanship in the moissanite gem(s). read morehttp://moissanite.ralphjacobs.co.za/ Authenticity Certificate All Ralph Jacobs Evermore Moissanites come with an authenticity certificate.Remember to Register your Warranty on our Moissanite Website:http://moissanite.ralphjacobs.co.za/ Shipment and Delivery We now offer FREE shipping within South Africa. Delivery of your Ralph Jacobs created Moissanite will take 15- working days from date of order. For more information visit our website www.ralphjacobs.co.za/moissanite email us

    STUNNING 3.31 CARAT FLAWLESS TOP FIRE RARE  ‘PINK WITH YELLOW OVERTONES’ NATURAL RATANAKIRI CAMBODIAN ZIRCON. GEM TYPE: NATURAL ZIRCON CARAT WEIGHT: 3.31 CARATS DIMENSIONS: 8.15 x 6.05 x 5.40mm CLARITY: FLAWLESS  CUT: CUSHION ORIGIN: BOR KEO, RATANAKIRI, CAMBODIA TREATMENTS: NONE Zircon is actually the oldest known mineral on Earth - the oldest samples are even older than the Moon, which formed about 4 billion years ago. Zircon was the first crystal to form in molten granite as it cooled to form rock. It formed as the result of a process associated with the presence of Uranium and Thorium. The natural radioactivity disrupts the crystal structure and produces the changes in color and density through a process known as metamictization.   Ratanakiri is one of the wildest and least visited regions in Cambodia. It is located in the north-east side of the country, bordering Laos and Vietnam. There one can find steaming jungles,  breathtaking waterfalls, amazing wildlife, and of course, the mines of the majestic Zircon.   The District of Bor Keo (Borkeo) where this specimen was mined is located about thirty kilometres from the regional capital Banlung. When people are asked about Cambodia, two things come to mind: Angkor Wat and the Khmer Rouge. With awareness and careful management of its resources, hopefully we can add Cambodia’s natural beauty to that list. The fire in Zircon, called dispersion, is caused by light entering the gemstone and separating into a prism of rainbow colors. Possessing dispersion approaching that of Diamond, the brilliance of Zircon is second to none. The Zircon Cut, a variation of the Brilliant Cut that adds eight extra facets to the pavilion, was designed to take advantage of these properties. A very unique characteristic of Zircon is birefringence (doubly refractive), meaning that light splits into two rays as it passes through the gem. As a result, the back facets appear as double images.

    SPECTACULAR 3.64 CARAT VVS RARE  ‘IMPERIAL GOLD WITH ORANGE OVERTONES’ NATURAL RATANAKIRI CAMBODIAN ZIRCON. GEM TYPE: NATURAL ZIRCON CARAT WEIGHT: 3.64 CARATS DIMENSIONS: 8.49 x 7.38 x 5.59mm CLARITY: VVS (NEAR FLAWLESS) ORIGIN: BOR KEO, RATANAKIRI, CAMBODIA TREATMENTS: NONE Zircon is actually the oldest known mineral on Earth - the oldest samples are even older than the Moon, which formed about 4 billion years ago. Zircon was the first crystal to form in molten granite as it cooled to form rock. It formed as the result of a process associated with the presence of Uranium and Thorium. The natural radioactivity disrupts the crystal structure and produces the changes in color and density through a process known as metamictization.   Ratanakiri is one of the wildest and least visited regions in Cambodia. It is located in the north-east side of the country, bordering Laos and Vietnam. There one can find steaming jungles,  breathtaking waterfalls, amazing wildlife, and of course, the mines of the majestic Zircon.   The District of Bor Keo (Borkeo) where this specimen was mined is located about thirty kilometres from the regional capital Banlung. When people are asked about Cambodia, two things come to mind: Angkor Wat and the Khmer Rouge. With awareness and careful management of its resources, hopefully we can add Cambodia’s natural beauty to that list. The fire in Zircon, called dispersion, is caused by light entering the gemstone and separating into a prism of rainbow colors. Possessing dispersion approaching that of Diamond, the brilliance of Zircon is second to none. The Zircon Cut, a variation of the Brilliant Cut that adds eight extra facets to the pavilion, was designed to take advantage of these properties. A very unique characteristic of Zircon is birefringence (doubly refractive), meaning that light splits into two rays as it passes through the gem. As a result, the back facets appear as double images.